U.S. SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549

                                   FORM 10-KSB

[X]      ANNUAL REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES  EXCHANGE ACT
         OF 1934

                   For the fiscal year ended December 31, 2003

[_]      TRANSITION REPORT UNDER SECTION 13 OR 15(d) OF THE SECURITIES  EXCHANGE
         ACT OF 1934

          For the transition period from _____________ to _____________

                         Commission file number 1-31398

                        NATURAL GAS SERVICES GROUP, INC.
                 (Name of small business issuer in its charter)

COLORADO                                                     75-2811855
--------                                                     ----------
(State or other jurisdiction of                              (I.R.S. Employer
incorporation or organization)                               Identification No.)

2911 South County Road 1260
Midland, Texas                                               79706
--------------                                               -----
(Address of principal executive offices)                     (Zip Code)

Issuer's telephone number:  (432) 563-3974

                              --------------------

         Securities registered under Section 12(b) of the Exchange Act:

                                  Common Stock
                                  ------------
                                (Title of Class)


                        Warrants to Purchase Common Stock
                        ---------------------------------
                                (Title of Class)

         Securities registered under Section 12(g) of the Exchange Act:

                                      None
         --------------------------------------------------------------
                                (Title of Class)

         Check whether the issuer (1) filed all reports  required to be filed by
Section 13 or 15(d) of the  Exchange  Act during the past 12 months (or for such
shorter period that the  registrant was required to file such reports),  and (2)
has been subject to such filing requirements for the past 90 days. Yes |X| No
                                                                       ---   ---

         Check if there is no  disclosure  of  delinquent  filers in response to
Item 405 of  Regulation  S-B contained in this form,  and no disclosure  will be
contained,  to the best of the  registrant's  knowledge,  in definitive proxy or
information statements incorporated by reference in Part III of this Form 10-KSB
or any amendment to this Form 10-KSB.
                                     ---

         State issuer's revenue for its most recent fiscal year: $12,749,522

         The aggregate  market value of the voting and non-voting  common equity
held by non-affiliates  at March 23, 2004,  computed by reference to the closing
price of $6.85 per share on the American Stock Exchange, was $16,096,979.

         The number of shares  outstanding  of each of the  issuer's  classes of
common equity on March 23, 2004, was 5,033,681.

                       Documents Incorporated by Reference
                                      None

         Transitional Small Business Disclosure Format Yes    No |X|
                                                          ---    ---

================================================================================




                                     PART 1

                SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

         This Annual Report on Form 10-KSB (this "Report" or this "Form 10-KSB")
contains certain  forward-looking  statements and information  pertaining to us,
our  industries and the oil and gas industry that is based on the beliefs of our
management,  as well as assumptions made by and information  currently available
to our  management.  All statements,  other than statements of historical  facts
contained in this Report,  including  statements  regarding our future financial
position,  growth strategy,  budgets,  projected costs,  plans and objectives of
management for future operation,  are  forward-looking  statements.  Although we
believe our expectations reflected in these forward-looking statements are based
on reasonable  assumptions,  no assurance  can be given that these  expectations
will prove to have been  correct.  Important  factors  that could  cause  actual
results  to  differ   materially   from  the   expectations   reflected  in  the
forward-looking statements include, among other things:

         o        conditions in the gas and oil  industry,  including the demand
                  for natural gas and the price of oil and natural gas,

         o        competition   among  the  various   providers  of  compression
                  services and products,

         o        changes  in  safety,  health  and  environmental   regulations
                  pertaining to the  production  and  transportation  of natural
                  gas,

         o        changes in economic or political  conditions in the markets in
                  which we operate, and

         o        introduction of competing technologies by other companies.

         In addition,  the factors  described in  "Management's  Discussion  and
Analysis of Financial  Condition and Results of Operation - Risk Factors"  could
cause our actual results to differ materially from the expectations reflected in
the  forward-looking  statements  contained  herein.  These statements relate to
"Description  of Business,"  "Management's  Discussion and Analysis of Financial
Condition and Results of Operation" and other  sections of this Report.  In some
cases, you can identify forward-looking statements by terminology such as "may,"
"will,"   "should,"   "expect,"   "plan,"   "intend,"  and   "anticipate."   The
forward-looking  statements in this Report are based largely on our expectations
and are subject to a number of risks and uncertainties,  which may be beyond our
control.  Actual results may differ  materially  from the anticipated or implied
results in the forward-looking  statements.  We do not intend to publicly update
or  revise  any  forward-looking   statements,   whether  as  a  result  of  new
information,   future  events  or  otherwise.   In  light  of  these  risks  and
uncertainties,  we can give no assurances  that the  forward-looking  events and
circumstances included in this Report will occur.


                                       2


ITEM 1. DESCRIPTION OF BUSINESS

History and Organization

         We were  incorporated on December 17, 1998 and initially  operated as a
holding  company of Flare King,  Inc.,  Hi-Tech  Compressor  Company,  L.C., NGE
Leasing,  Inc.  and CNG Engines  Company.  In July 2000,  Flare King and Hi-Tech
merged and now operate as Rotary Gas Systems,  Inc. Effective March 31, 2000, we
sold CNG.

         On March 29, 2001,  we  acquired,  through our then  subsidiary,  Great
Lakes  Compression,  Inc.,  all of the  compression  related  assets of Dominion
Michigan Petroleum Services,  Inc., an unaffiliated company that is a subsidiary
of Dominion  Resources,  Inc.  and that was in the  business  of  manufacturing,
fabricating, selling, leasing and maintaining natural gas compressors. As a part
of the transaction,  an affiliate of Dominion Michigan  committed to purchase or
to  enter  into  five  year  leases  for  compressors   totaling  five  thousand
horsepower. The purchases or leases are to be made by December 31, 2005.

         On October 24, 2002, we closed our initial public offering  pursuant to
a registration statement that was declared effective on October 21, 2002. In the
offering,  we sold a total of 1,500,000  shares of our common stock and warrants
to purchase  1,500,000  shares of our common stock at a total of $5.25 per share
and  warrant for an  aggregate  amount  $7,875,000.  After  deducting  the total
expenses of the  offering,  we received net offering  proceeds of  approximately
$6,529,170.

         On March 27, 2003, we acquired 28 compressor packages from Hy-Bon
Engineering Company, Inc. for $2,150,000.

         On January 1, 2004, our wholly-owned  subsidiaries  were merged into us
except HBRC which will be dissolved in 2004.  Thus,  all of our assets are owned
by, and our business is conducted through, us.

Company Business

Overview

         We provide  equipment and services to the natural gas and oil industry.
We manufacture,  fabricate,  sell and lease natural gas compressors that enhance
the  production  of oil and gas wells and we provide  maintenance  services  for
those  compressors.  We define a natural gas  compressor as a mechanical  device
with one basic goal - to deliver gas at a pressure  higher than that  originally
existing. It may be powered by a natural gas burning engine or an electric motor
to  accommodate  different  applications.   Gas  compression  is  undertaken  to
transport and distribute  natural gas to pipelines.  Pipeline pressures vary and
with the  addition  of new  wells  to the  pipeline,  the  need for  compression
increases.  We also manufacture and sell flare tips and ignition systems for oil
and gas plant and  production  facilities.  We define a flare tip as a burner on
the upper end of a flare stack that is designed to combust waste gases to assure


                                       3


a clean  environment.  An ignition  system is a pilot light or a spark generator
that assures continuous  ignition of the waste gases going through the burner in
the flare tip.

         We primarily lease natural gas compressors. As of December 31, 2003, we
had 359 natural gas compressors under lease to third parties.

         We also fabricate natural gas compressors for our customers,  designing
compressors to meet unique specifications dictated by well pressures, production
characteristics and particular applications for which compression is sought.

         We have  established an exchange and rebuild program to attempt to help
minimize  costs and maximize  revenue for our customers.  Under the program,  we
work  with  maintenance  and  operating  personnel  of a  customer  to  identify
equipment for exchange.  When we receive a compressor for exchange  because of a
maintenance problem, we deliver to our customer a replacement compressor at full
price. We then rebuild the exchange compressor and credit our customer an amount
based on the  value of the  rebuilt  compressor.  We also  offer a  retrofitting
service by repackaging a customer's  compressor with a compressor that meets our
customer's changed conditions.

         We design,  manufacture,  install and service  flare stacks and related
ignition and control  devices for onshore and offshore  burning of gas compounds
such as hydrogen sulfide,  carbon dioxide,  natural gas and liquefied  petroleum
gases.

         We have  manufacturing and fabrication  facilities located in Lewiston,
Michigan,  and Midland,  Texas,  where we manufacture and fabricate  natural gas
compressors. We design and manufacture natural gas flare systems, components and
ignition  systems  in our  facility  in  Midland,  Texas,  for use in  oilfield,
refinery and petrochemical plant  applications.  We also have service facilities
located in Midland, Texas, Lewiston, Michigan, Bridgeport, Texas and Bloomfield,
New  Mexico  to  provide  maintenance  inventory  and  support  for  our  rental
compressor fleet and for third party services.

         We currently  provide our  products and services to a customer  base of
oil  and  gas  exploration  and  production  companies  operating  primarily  in
Colorado, Kansas, Louisiana, Michigan, New Mexico, Oklahoma, Texas and Wyoming.

         We  maintain  our  principal  office at 2911  South  County  Road 1260,
Midland, Texas 79706 and our telephone number is (432) 563-3974.

Industry Background

         Our  products  and  services  are  related to the oil and  natural  gas
industries.  The oil and natural gas  industry is  comprised  of several  large,
well-capitalized companies accounting for the majority of the market. There also
exist a large number of small  privately held companies  making up the remainder
of  the  market.   According  to   information   from  the  Energy   Information
Administration there is a growing demand for natural gas in this country.



                                       4


         We believe that there will continue to be a growing  demand for natural
gas.  Because of this,  demand for our  products  and  services  is  expected to
continue to rise as a result of:

         o        the  increasing  demand  for  energy,  both  domestically  and
                  abroad;

         o        environmental  considerations  which provide strong incentives
                  to use natural gas in place of other carbon fuels;

         o        the cost savings of using natural gas rather than  electricity
                  for heat generation;

         o        implementation of international environmental and conservation
                  laws;

         o        the aging of producing natural gas reserves worldwide; and

         o        the extensive supply of undeveloped natural gas reserves.

         By using a  compressor,  the  operator of a natural gas well is able to
increase the pressure of natural gas from a well to make it economically  viable
by enabling gas to continue to flow in the pipeline to its destination.  We feel
that we are  well  positioned  through  our gas  compression  and  flare  system
activities to take advantage of the aging of reserves and the development of new
reserves.

The Compression Business

         Natural gas compressors  are used in a number of applications  intended
to enhance the productivity of oil and gas wells, gas  transportation  lines and
processing  plants.  Compression  equipment is often  required to boost a well's
production to  economically  viable levels and enable gas to continue to flow in
the pipeline to its  destination.  We believe that most  producing  gas wells in
North America, at some point, will utilize compression. As of December 31, 2002,
the Energy  Information  Administration  reported that there were  approximately
386,000 producing gas and gas condensate wells in the United States.  The states
where we currently operate, account for approximately 100,000 of these wells.

The Leasing Business

         We primarily lease natural gas compressors. As of February 29, 2004, we
had 385 natural gas compressors totaling  approximately 43,149 horsepower leased
to  45  third  parties,   compared  to  313  natural  gas  compressors  totaling
approximately 33,240 horsepower leased to 29 third parties at February 28, 2003.
Of the 385 natural gas compressors,  50 were leased to Dominion Michigan and its
affiliates.

         As a part  of our  leasing  business,  in  2000  we  formed  a  limited
liability   company,   Hy-Bon  Rotary  Compression  LLC,  ("HBRC")  with  Hy-Bon
Engineering  Company,  Inc.,  a  non-affiliated  company,  to lease  natural gas
compressors.  We formed HBRC to lease  compressors  to a customer with which the
non-affiliated company had a relationship.  The non-affiliated company owned 50%


                                       5


and we owned 50% of HBRC. The non-affiliated  company managed HBRC. We split the
expenses  of HBRC with the other  company.  After the  payment of  expenses,  we
received  whatever  profit  is  realized  by HBRC in  proportion  to the  amount
received by HBRC from the lease of natural gas compressors  that are contributed
by us and by the non-affiliated company to HBRC. As of February 28, 2003, we had
contributed 40 compressors  and the  non-affiliated  company had  contributed 28
compressors to HBRC.

         On March 27, 2003,  to be effective  January 1, 2003,  we purchased and
Hy-Bon sold to us the 28 compressor  packages it contributed.  In  consideration
therefore, we paid Hy-Bon $2,150,000. The $2,150,000 was borrowed by us from our
current lender.

         Hy-Bon has  withdrawn  as a member of HBRC  effective  as of January 1,
2003. We, as the other member of HBRC,  retained all assets of HBRC, which as of
January 1, 2003, had an unaudited aggregate value of approximately  $346,000. We
will dissolve HBRC in 2004 and have agreed to not operate using the name Hy-Bon.

         In addition  to 80 separate  written  maintenance  agreements  covering
non-owned  compressor  units that we had entered into at February  29, 2004,  we
provide  maintenance  as a part of our  compressor  leases.  Many  companies and
individuals are turning to leasing of equipment  instead of purchasing.  Leasing
does not  require  the  purchaser  to make large  capital  expenditures  for new
equipment or to obtain financing through a lending  institution.  This frees the
customer's assets for developing the customer's  business.  Our leases generally
have  initial   terms  of  from  six  to  24  months  and  then  continue  on  a
month-to-month  basis.  The leases  with  Dominion  Exploration  have an initial
five-year term. Lease rentals are paid monthly.  At the end of a lease term, the
customer may continue to pay monthly rentals on the equipment, or we may require
them to return it to us.

         Changing well and pipeline  pressures and conditions over the life of a
well often require  producers to reconfigure  their compressor units to optimize
the well  production  or pipeline  efficiency.  Because the  equipment is highly
technical,  a trained staff of field  service  personnel,  a  substantial  parts
inventory and a diversified fleet of natural gas compressors are often necessary
to perform reconfiguration  functions in an economic manner. It is not efficient
or, in many cases,  economically  possible for independent natural gas producers
to maintain  reconfiguration  capabilities  individually.  Also,  our management
believes that, in order to streamline  their operations and reduce their capital
expenditures  and other costs, a number of major oil and gas companies have sold
portions of their domestic energy reserves to independent  energy  producers and
have  outsourced  many  facets  of  their  operations.  We  believe  that  these
initiatives  are  likely  to  contribute  to  increased   rental  of  compressor
equipment.  For that reason, we have created our own compressor-rental  fleet to
take advantage of the rental market, we spent  approximately  $6,505,500 in 2003
to  expand  our  natural  gas  compressor  inventory,  and we  intend  to  spend
approximately $10,200,000 in 2004 on natural gas compressors.



                                       6


         The size, type and geographic  diversity of our rental fleet enables us
to provide our customers with a range of compression units that can serve a wide
variety of applications, and to select the correct equipment for the job, rather
than the customer  trying to fit the job to its own  equipment.  We base our gas
compressor  rental rates on several factors,  including the cost and size of the
equipment,  the type and  complexity  of service  desired by the  customer,  the
length of contract,  and the inclusion of any other  services  desired,  such as
leasing, installation, transportation and daily operation.

Custom Fabrication

         We  also  engineer  and  fabricate  natural  gas  compressors  for  our
customers to meet their unique specifications based on well pressure, production
characteristics and the particular applications for which compression is sought.
In  order  to meet  the  ongoing  needs  of our  customers  for  whom we  custom
fabricate,  we  offer  a  variety  of  services,   including:  (i)  engineering,
manufacturing and fabrication of the compressors;  (ii) installation and testing
of compressors; (iii) ongoing performance review to assess the need for a change
in compression:  and (iv) periodic maintenance and parts replacement. We receive
revenue for each service.

Maintenance

         Although  natural gas compressors  generally do not suffer  significant
technological  obsolescence,  they do require  routine  maintenance and periodic
refurbishing  to  prolong  their  useful  life.  Routine  maintenance   includes
alignment and compression  checks and other parametric  checks indicate a change
in the condition of the compressors. In addition, oil and wear-particle analysis
is  performed  on all  compressors.  Overhauls  are  done  on a  condition-based
interval  or  a  time-based  schedule.  Based  on  our  past  experience,  these
maintenance  procedures  maximize  component  life  and  unit  availability  and
minimize downtime.

         As of February 29, 2004,  we had written  maintenance  agreements  with
third parties relating to 80 compressors. Each written maintenance agreement has
from two to 5 years  left on its term and each  expires  on  December  31 in the
expiration year.  During our years ended December 31, 2003 and 2002, we received
revenue of approximately $1,073,000 and $1,058,000  (approximately 8% and 10% of
our total consolidated revenue), respectively, from maintenance agreements.

Exchange and Rebuild Program

         We have  established an exchange and rebuild program to attempt to help
minimize costs and maximize our customers' revenue. This program is designed for
operations  with rotary screw  compressors  where  downtime and lost revenue are
critical.

         Under  the  program,  we  work  with  our  customer's  maintenance  and
operating  personnel to identify and quantify  equipment for  exchange.  When we
receive a  compressor  for exchange  due to a problem  with the  compressor,  we
deliver to our customer a replacement  compressor at full price. We then rebuild
the  exchange  compressor  and credit our  customer  with an amount based on the
value of the compressor we rebuild.



                                       7


         This program  enables our customers to obtain  replacement  compressors
and shorten the time that the customer is unable to realize gas production  from
one or more wells because of the lack of a compressor.

         During the years ended December 31, 2003 and 2002, we received revenue
of approximately $597,000 and $630,000 (approximately 4.7% and 6% of our total
consolidated revenue), respectively, from exchanging and rebuilding rotary screw
compressors for third parties.

Retrofitting Service

         We recognize the capital  invested by our customers in compressors.  We
also  recognize  that   producing   wells  and  gas  gathering   systems  change
significantly during their operating life. To meet these changing conditions and
help our customers  maximize  their  operating  income,  we offer a retrofitting
service by repackaging a customer's  compressor with a compressor that meets our
customer's changed conditions.

The Flare Business

         The  drilling  for and  production  of oil and gas  results  in certain
gaseous hydrocarbon  byproducts that generally must be burned off at the source.
Although   flares  and  flare  systems  have  been  part  of  the  oilfield  and
petrochemical environment for many years, increasing regulation of emissions has
resulted in a significant  increase in demand for flare systems of  increasingly
complex  design  meeting  new  environmental  regulations.  Growth is  primarily
related,  as is the case for most industries  connected with oil and gas, to the
price of oil and gas and new environmental regulations.

         We design,  manufacture,  install and service  flare stacks and related
ignition  and  control  devices  for the  onshore  and  offshore  burning of gas
compounds such as hydrogen  sulfide,  carbon dioxide,  natural gas and liquefied
petroleum gases. We produce two ignition systems for varied applications:  (a) a
standing jet-like pipe for minimal fuel consumption,  with a patented electronic
igniter; and (b) an electronic sparked ignition system. Flare tips are available
in carbon steel as well as many grades of stainless steel alloys. The stacks can
be free  standing,  guyed,  or trailer  mounted.  The flare  stack and  ignition
systems  use a  smokeless  design  for  reduced  emissions  to  meet  or  exceed
government   regulated   clean  air   standards.   Our  product  line   includes
solar-powered  flare ignition systems and thermocouple  control systems designed
to detect the loss of combustion in the product  stream and reignite the product
stream.  These products contain  specially-designed  combustion tips and utilize
pilot flow Venturi tubes to maximize the  efficient  burning of waste gas with a
minimal  use of pilot or  assist  gas,  thereby  minimizing  the  impact  on the
environment  of the  residual  output.  Increased  emphasis  on "clean  air" and
industry  emissions has had a positive effect on the flare  industry.  Our broad
energy industry  experience has allowed us to work closely with our customers to
seek cost-effective solutions to their flare requirements.



                                       8


         During the years ended  December  31, 2003 and 2002,  we sold 62 and 39
flare systems,  respectively, to our customers generating approximately $821,000
and $759,000  (approximately  6% and 7 % of our total  consolidated  revenue) in
revenue, respectively.

Major Customers

         During  our  year  ended  December  31,  2003  and  2002,  sales to one
customer,   Dominion   Michigan,   amounted  to   approximately   28%  and  30%,
respectively, of our consolidated revenue.

Continuing Product Development

         We engage in a continuing  effort to improve our  compressor  and flare
operations.  Continuing  development  activities in this regard  include new and
existing  product  development  testing  and  analysis,  process  and  equipment
development and testing, and product performance improvement.  We also focus our
activities on reducing overall costs to the customer,  which include the initial
capital cost for  equipment,  the monthly  leasing cost if  applicable,  and the
operating costs associated with such equipment,  including  energy  consumption,
maintenance costs and environmental emissions.

         During our years ended December 31, 2003 and 2002, we did not spend any
material  amounts  on  research  and  development  activities.  Rather,  product
improvements were made as a part of our normal operating activities.

Sales and Marketing

         General.   We  conduct  our  operations  from  four  locations.   These
locations,  with the exception of our executive  offices,  maintain an inventory
for local customer requirements,  trained service technicians, and manufacturing
capabilities to provide quick delivery and service for our customers.  Our sales
force also operates out of these locations and focuses on communication with our
customers and potential  customers  through  frequent direct contact,  technical
assistance, print literature, direct mail and referrals. Our sales and marketing
is performed by nine employees.

         Additionally,  our  personnel  coordinate  with each  other to  develop
relationships  with  customers  who  operate  in  multiple  regions.  Our  sales
personnel maintain  intensive contact with our operations  personnel in order to
promptly  respond to and  address  customer  needs.  Our overall  sales  efforts
concentrate on  demonstrating  our  commitment to enhancing the customer's  cash
flow through enhanced product design, fabrication, manufacturing,  installation,
customer service and support.

         During  the  years  ended   December  31,  2003  and  2002,   we  spent
approximately $46,000 and $49,000, respectively, on advertising.

         Compression Activity.  The compression marketing program emphasizes our
ability to design and fabricate  natural gas  compressors in accordance with the
customer's unique  specifications  and to provide all necessary service for such
compressors.



                                       9


         Flare Systems Activity.  The flare systems marketing program emphasizes
our ability to design, manufacture,  install and service flares with the updated
technology.

Competition

         Compression   Activity.   The  natural  gas  compression   business  is
competitive.  We experience  competition  from companies with greater  financial
resources.  On a regional basis, we experience  competition from several smaller
companies that compete  directly with us. We have a number of competitors in the
natural gas compression  segment,  but we do not have sufficient  information to
determine our competitive position within that group. We believe that we compete
effectively on the basis of price,  customer  service,  including the ability to
place personnel in remote  locations,  flexibility in meeting customer needs and
quality and reliability of our compressors and related services.

         Compressor  industry  participants can achieve  significant  advantages
through  increased  size  and  geographic  breadth.  As  the  number  of  rental
compressors in our rental fleet  increases,  the number of sales,  support,  and
maintenance  personnel  required  and the minimum  level of  inventory  does not
increase commensurately.  As a result of economies of scale, we believe that we,
with a growing rental fleet,  have  relatively  lower operating costs and higher
margins than smaller companies.

         Flare Systems Activity.  The flare business is highly  competitive.  We
have a number of  competitors in the flare systems  segment,  but we do not have
sufficient  information to determine our competitive position within that group.
We believe  that we are able to compete by our  offering  products  specifically
engineered for the customer's needs.

Employees

         As of December  31,  2003,  we had 80 total  employees of which 79 were
fulltime employees. No employees are represented by a labor union.

Liability and Other Insurance Coverage

         Our equipment and services are provided to customers who are subject to
hazards  inherent in the oil and gas  industry,  such as  blowouts,  explosions,
craterings,  fires,  and oil spills.  We maintain  liability  insurance  that we
believe is customary in the industry. We also maintain insurance with respect to
our  facilities.  Based  on our  historical  experience,  we  believe  that  our
insurance coverage is adequate.

Government Regulation

         We  are  subject  to  numerous  federal,   state  and  local  laws  and
regulations  relating  to the  storage,  handling,  emission  and  discharge  of
materials  into  the  environment,  including  the  Comprehensive  Environmental
Response, Compensation and Liability Act, the Clean Water Act, the Clean Air Act
and the Resource  Conservation  and Recovery Act. As a result of our operations,
we generate or manage hazardous wastes, such as solvents,  thinner, waste paint,
waste  oil,  washdown  wastes  and  sandblast  material.  We  currently  spend a



                                       10


negligible  amount  each year to dispose of the  wastes.  Although we attempt to
identify and address contamination before acquiring properties,  and although we
attempt  to  utilize  generally  accepted  operating  and  disposal   practices,
hydrocarbons  or other wastes may have been  disposed of or released on or under
properties owned,  leased, or operated by us or on or under locations where such
wastes have been taken for disposal. These properties and the wastes or remedial
sites where they have been released might have to be remediated at our expense.

         We believe  that our  existing  environmental  control  procedures  are
adequate  and we have no  current  plans for  substantial  operating  or capital
expenditures relating to environmental control requirements.  We believe that we
are in substantial  compliance with  environmental laws and regulations and that
the phasing in of emission  controls and other known regulatory  requirements at
the rate currently  contemplated  by such laws and  regulations  will not have a
material adverse affect on our financial condition or operational results.  Some
risk of  environmental  liability  and other costs are inherent in the nature of
our business,  however,  and there can be no assurance that environmental  costs
will not rise.  Moreover,  it is  possible  that  future  developments,  such as
increasingly strict requirements and environmental laws and enforcement policies
thereunder,  could lead to material  costs of  environmental  compliance  by us.
While we may be able to pass on the additional  cost of complying with such laws
to our  customers,  there can be no  assurance  that  attempts  to do so will be
successful.

Patents, Trademarks and Other Intellectual Property

         We  believe  that  the  success  of our  business  depends  more on the
technical  competence,  creativity and marketing abilities of our employees than
on any individual patent, trademark, or copyright.  Nevertheless, as part of our
ongoing research,  development and manufacturing activities, we have a policy of
seeking  patents when  appropriate  on  inventions  concerning  new products and
product  improvements.  We  currently  own two United  States  patents  covering
certain flare system technologies, which expire in May 2006 and in January 2010,
respectively. We do not own any foreign patents. Although we continue to use the
patented  technology and consider it useful in certain  applications,  we do not
consider these patents to be material to our business as a whole.

Suppliers and Raw Materials

         With respect to our flare  system and  compressor  operations,  our raw
materials  used consist of cast and forged iron and steel.  Such  materials  are
generally  available  from a number of suppliers,  and  accordingly,  we are not
dependent on any particular  supplier for these new  materials.  We currently do
not have long-term  contracts  with our suppliers of raw materials,  but believe
our sources of raw  materials  are reliable and adequate for our needs.  We have
not experienced any significant supply problems in the past.

         Certain  components of our compressors are obtained primarily from four
suppliers.  If either one of our  current  major  suppliers  should  curtail its
operations  or be  unable  to meet our  needs,  we  would  encounter  delays  in
supplying our customers with compressors until an alternative  supplier could be
found. We may not be able to find acceptable alternative suppliers.



                                       11


ITEM 2. DESCRIPTION OF PROPERTY

         We maintain our executive  offices in Midland,  Texas. This facility is
owned  by us  and  is  used  for  manufacturing,  fabrication,  remanufacturing,
operations,   testing,  warehousing  and  storage,  general  and  administrative
functions and training.

         The facility in Midland is an approximately 24,600 square foot building
that provides us with sufficient  space to  manufacture,  fabricate and test our
equipment on site and has land available to expand the building when needed. Our
current  facilities  in Midland are  anticipated  to provide us with  sufficient
space and  capacity  for at least the next  year and thus  there are no  current
plans to open new locations,  unless they are acquired as a result of any future
acquisitions.

         The   facilities   in  Lewiston,   Michigan   consist  of  a  total  of
approximately  15,360 square feet.  Approximately  9,360 square feet are used as
offices  and a repair  shop and  approximately  6,000  square  feet are used for
manufacturing and fabrication of compressors and storage.

         The facility in Bloomfield, New Mexico is an approximately 4,000 square
foot building that is leased at a current rate of $2,650 per month pursuant to a
lease that terminates in May 2008.  Approximately  1,000 square feet are used as
office space and approximately 3,000 square feet are used for shop space.

         The facility in Bridgeport, Texas is an approximately 4,500 square foot
building  that is leased at a current  rate of $1,500  per month  pursuant  to a
lease that terminates in August 2006. Approximately 4,000 square feet is used as
office space and approximately 500 square feet is used as shop space.

         We also own an approximately 4,100 square foot building in Midland that
is leased  at a  current  rate of  $1,050  per  month to an  unaffiliated  party
pursuant  to a lease  that  terminates  in May 2005.  This  facility  previously
contained our executive offices and manufacturing and fabrication operations.

         We believe that our  properties  are generally  well  maintained and in
good condition.

ITEM 3. LEGAL PROCEEDINGS

         There are no pending legal proceedings against our properties or us.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         We did not submit anything to a vote of our security holders during the
fourth quarter of our fiscal year ended December 31, 2003.






                                       12


                                     PART II

ITEM 5. MARKET FOR COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND SMALL BUSINESS
ISSUER PURCHASES OF EQUITY SECURITIES

Our common stock and warrants are quoted on the American  Stock  Exchange  under
the symbols NGS and NGS.WS, respectively. The following table sets forth for the
periods  indicated  the high and low  sales  prices  for our  common  stock  and
warrants  as reported  by the  American  Stock  Exchange.  Our common  stock and
warrants began trading on October 21, 2002.

----------------------------------- ---------------------- ---------------------
                                          Common Stock            Warrants
----------------------------------- ---------------------- ---------------------
                                      High          Low      High          Low
----------------------------------- ---------- ----------- ---------- ----------
Oct. 21, 2002 through Dec. 31, 2002   $4.25        $3.35     $0.90        $0.25
----------------------------------- ---------- ----------- ---------- ----------
2003
----------------------------------- ---------- ----------- ---------- ----------
First Quarter                         $4.30        $3.70     $0.80        $0.63
----------------------------------- ---------- ----------- ---------- ----------
Second Quarter                        $7.25        $3.65     $1.55        $0.55
----------------------------------- ---------- ----------- ---------- ----------
Third Quarter                         $6.75        $5.45     $1.65        $1.06
----------------------------------- ---------- ----------- ---------- ----------
Fourth Quarter                        $6.24        $5.25     $1.70        $1.25
----------------------------------- ---------- ----------- ---------- ----------


         As of December 31, 2003, there were  approximately 25 holders of record
of our  common  stock and 2 holders  of record of our  warrants.  The  number of
holders of record does not include  holders whose  securities are held in street
name.

         We have never  declared or paid any dividends on our common  stock.  We
anticipate that, for the foreseeable  future,  all earnings will be retained for
use in our business and no cash  dividends will be paid to holders of our common
stock.  If we were to pay cash  dividends in the future on the common stock,  it
would be dependent upon our:

         o        financial condition,

         o        results of operations,

         o        current and anticipated cash requirements,

         o        plans for expansion,

         o        restrictions, if any, under debt obligations,

         as well as other factors that our board of directors  deemed  relevant.
Our  agreement  with our bank contains  provisions  that restrict us from paying
dividends on our common stock.



                                       13


         We have 343,654 shares of our 10% Convertible  Series A Preferred Stock
outstanding. Holders of that stock are entitled to cash dividends paid quarterly
at a rate  equal  to 10%  per  annum  or  $0.325  per  share  annually.  The 10%
Convertible Series A Preferred Stock will automatically  convert into our common
stock at any time  after  April 24,  2003,  if our  common  stock  trades for 20
consecutive  trading days after the six-month period at a price of $6.50 or more
per share.

         The  following  is  a  table  with  information  regarding  our  equity
compensation plans as of December 31, 2003:



---------------------- ---------------------- ----------------------- ------------------------
Plan category          Number of securities   Weighted-average        Number of securities
                       to be issued upon      exercise price of       remaining available for
                       exercise of            outstanding options,    future issuance under
                       outstanding options,   warrants and rights     equity compensation
                       warrants and rights                            plans (excluding s
                                                                      ecurities reflected in
                                                                      column (a))


                       (a)                                            (c)
                                              (b)
---------------------- ---------------------- ----------------------- ------------------------
                                                             
Equity compensation
plans approved by
security holders             80,000                  $3.92                   70,000


---------------------- ---------------------- ----------------------- ------------------------
Equity compensation
plans not approved by
security holders               -                       -                       -
---------------------- ---------------------- ----------------------- ------------------------
Total                        80,000                  $3.92                   70,000
---------------------- ---------------------- ----------------------- ------------------------



Sales of Unregistered Securities During the Year Ended December 31, 2003

         During the three months ended June 30, 2003,  holders of 24,000  shares
of our outstanding 10% Convertible Series A Preferred Stock converted the shares
into 24,000 shares of our common stock. There was no underwriter involved in the
transactions.  The shares of our common  stock were all issued in reliance  upon
the  exemption  contained  in Section  4(2) of the  Securities  Act of 1933,  as
amended,  because all of the persons were  accredited  investors and appropriate
restrictive  legends were place on the certificates  unless the shares were sold
pursuant to the provisions of Rule 144.

         In June 2003 we issued 100,000 shares of our common stock to one person
upon the exercise of an option that the person owned.  The shares were issued in
a transaction  not involving a public  offering and were issued in reliance upon
the exemption  from  registration  provided by Section 4(2) of the 1933 Act. The
person to whom the shares were issued had access to full information  concerning
us. The certificate  for the shares contains a restrictive  legend advising that



                                       14


the shares may not be offered for sale,  sold or otherwise  transferred  without
having first been registered under the 1933 Act or pursuant to an exemption from
registration  under the 1933  Act.  There was no  underwriter  involved  in this
offering.

         During the three months  ended  September  30, 2003,  holders of 14,000
shares of our outstanding 10% Convertible Series A Preferred Stock converted the
shares into 14,000 shares of our common stock. There was no underwriter involved
in the transactions.  The shares of our common stock were all issued in reliance
upon the exemption  contained in Section 4(2) of the  Securities Act of 1933, as
amended,  because all of the persons were  accredited  investors and appropriate
restrictive  legends were placed on the certificates unless the shares were sold
pursuant to the provisions of Rule 144.

         In September  2003,  we issued 26,549 shares of our common stock to one
person and one company upon the  exercise of  outstanding  warrants.  The shares
were issued in  transactions  nor involving a public offering and were issued in
reliance upon the exemption  from  registration  provided by Section 4(2) of the
1933  Act.  The  persons  to whom the  shares  were  issued  had  access to full
information concerning us. The certificates for the shares contain a restrictive
legend  advising that the shares may not be offered for sale,  sold or otherwise
transferred  without having first been registered under the 1933 Act or pursuant
to an exemption from  registration  under the 1933 Act. There was no underwriter
involved in these offerings.

         In October  2003,  we issued  3,000 shares of our common stock at $3.25
per share upon the  exercise of a warrant by a holder  thereof.  The shares were
issued in a  transaction  not  involving  a public  offering  and were issued in
reliance upon the exemption  from  registration  provided by Section 4(2) of the
Securities  Act of 1933. The person to whom the shares were issued had access to
full  information  concerning  us. The  certificate  for the  shares  contains a
restrictive legend advising that the shares may not be offered for sale, sold or
otherwise transferred without having first been registered under the 1933 Act or
pursuant to an  exemption  from  registration  under the 1933 Act.  There was no
underwriter involved in the issuance of the 3,000 shares.

         On December 3, 2003 and on December  31,  2003,  we granted  options to
purchase in the aggregate 15,000 shares of our common stock and 12,500 shares of
our common stock, respectively, to three employees (an option to purchase 15,000
shares)  and to  five of our  independent  directors  (options  to  purchase  an
aggregate  of 12,500  shares).  We do not  consider  grants of these  options to
constitute sales.

         On  December 9, 2003,  we issued  6,000  shares of our common  stock at
$2.00 per share upon the  exercise  of options by a holder  thereof.  The shares
were issued in a transaction  not involving a public offering and were issued in
reliance upon the exemption  from  registration  provided by Section 4(2) of the
Securities  Act of 1933. The person to whom the shares were issued had access to
full information concerning us.

         No repurchases  of our  securities  were made by on our behalf of us or
any  "affiliated  purchaser" as defined in Rule 10b - 18(a)(3) during the fourth
quarter of the year ended December 31, 2003.



                                       15


ITEM 6. MANAGEMENT'S DISCUSSION AND ANALYSIS OR PLAN OF OPERATION

         The  following  discussion  should  be read  in  conjunction  with  the
consolidated  financial  statements  and  attached  notes  thereto and the other
financial  information  included  elsewhere  in  this  Report.  This  discussion
contains  forward-looking  statements that involve risks and uncertainties.  Our
actual results could differ  materially from those  anticipated in these forward
looking  statements  as a result of any number of factors,  including  those set
forth under the section entitled "Risk Factors" and elsewhere in this Report.

Overview

         We have  combined  the  operations  of our  wholly-owned  subsidiaries:
Rotary Gas  Systems,  NGE Leasing and Great Lakes  Compression.  These  entities
provide products and services to the oil and gas industry and are engaged in (1)
the  manufacture,  sale and rental of natural  gas  compressors  to enhance  the
productivity of oil and gas wells, and (2) the  manufacture,  sale and rental of
flares and flare ignition systems for plant and production  facilities.  We have
been the parent company and provide  administrative  and management support and,
therefore,  have expenses associated with that activity.  On January 1, 2004, we
merged our subsidiaries into us.

         We acquired the compression related assets of Great Lakes from Dominion
Michigan on March 27, 2001. This acquisition  significantly increased the number
of  compressor  units that we own and service and thereby  increased our revenue
and operating income beginning April 1, 2001 and continuing through December 31,
2003.

Results of Operations

Fiscal Year Ended  December 31, 2003 Compared to Fiscal Year Ended  December 31,
2002.



                                                                                          Natural Gas
                                                                            Great Lakes     Services
                                               Rotary Gas    NGE Leasing    Compression      Group          Total
                                              -----------    -----------    -----------   -----------    -----------
                                                                                          
Twelve Months Ended December 31, 2003
Revenue                                       $     2,884    $     4,803    $     5,062   $      --      $    12,749
Gross margin                                        1,255          3,418          2,020          --            6,693
Selling, general and administrative expense           924            174            317           878          2,293
Depreciation                                          150            888            662            25          1,725
Interest expense                                        7            475            162            23            667
Other income (expense)                                 (4)           (11)            11          --               (4)
Equity in earnings from joint venture                --             --             --            --
                                              -----------    -----------    -----------   -----------    -----------
Income before income taxes                    $       170    $     1,870    $       890   $      (926)   $     2,004
                                              ===========    ===========    ===========   ===========    ===========


Twelve Months Ended December 31, 2002
Revenue                                       $     3,298    $     2,319    $     4,680   $      --      $    10,297
Gross margin                                        1,329          1,669          1,727          --            4,725
Selling, general and administrative expense           791            161            268           497          1,717
Depreciation                                          122            439            558            47          1,166
Interest expense                                        9            392            537            38            976
Other income (expense)                                  4             15           --            --               19
Equity in earnings from joint venture                --              485           --            --              485
                                              -----------    -----------    -----------   -----------    -----------
Income before income taxes                    $       411    $     1,177    $       364   $      (582)   $     1,370
                                              ===========    ===========    ===========   ===========    ===========





                                       16


         Rotary Gas Systems Operations


         Revenue from outside  sources  decreased 13% or $414,000 for the twelve
months ended  December 31, 2003,  as compared to the same period ended  December
31, 2002.  Because our products are  custom-built,  fluctuations in revenue from
outside sources are expected. This decrease was mainly the result of a reduction
in the sale of compressor units to third parties.

         The gross margin  percentage  increased  from 40% for the twelve months
ended December 31, 2002, to 44% for the same period ended December 31, 2003. The
cost of revenue is  comprised of expenses  associated  with  service,  parts and
manufacturing  expenses.  This  increase  resulted  mainly  from a change in the
product mix.

         Selling,  general and administrative  expense increased $133,000 or 17%
for the twelve  months ended  December 31, 2003,  as compared to the same period
ended  December  31,  2002.  This was mainly the result of the  addition  of new
salesmen in the Farmington, New Mexico and West Texas areas.

         Depreciation  expense  increased  23% or $28,000 for the twelve  months
ended December 31, 2003, as compared to the same period ended December 31, 2002.
This increase was mainly due to the purchase of additional sales vehicles,  shop
and office equipment.

         NGE Leasing Operations

         Revenue from our rental of natural gas compressors increased $2,484,000
or 107% for the twelve  months ended  December 31, 2003, as compared to the same
period in 2002.  This increase is the result of units added to our rental fleet.
From December 31, 2002, to December 31, 2003, we added 95 gas  compressor  units
to our rental  fleet,  which  included the 28 units we purchased  from Hy-Bon on
March 31,  2003.  The  revenue  from the  Joint  Venture,  which was  previously
accounted for using the equity method,  has been consolidated  beginning January
1, 2003. The profit earned on the units purchased from Hy-Bon is included in our
consolidated earnings beginning April 1, 2003.

         The gross margin  percentage  decreased  from 72% for the twelve months
ended  December 31, 2002 to 71% for the same period  ending 2003.  This decrease
mainly resulted from a slight increase in maintenance  expenses  associated with
rental compressor units.



                                       17


         Selling, general and administrative expense increased $13,000 or 8% for
the twelve  months ended  December  31, 2003,  as compared to the same period in
2002.  This was mainly  the  result of an  increase  in sales  commissions  from
increased rental revenue.

         Depreciation  expense  increased 102% or $449,000 for the twelve months
ended December 31, 2003, as compared to the same period ended December 31, 2002.
This increase was the result of new gas  compressor  rental units being added to
the rental fleet during the period.

         There was an increase in interest  expense of 21% from $392,000 for the
twelve  months ended  December  31, 2002,  to $475,000 for the same period ended
December 31,  2003.  This is mainly as a result of an increase in bank debt used
to purchase equipment for the rental fleet and service vehicles.

         Great Lakes Compression

         Revenue  increased 8% for the twelve  months  ended  December 31, 2003,
compared to the same period in 2002.  This increase  resulted from a decrease in
the sales of compressor  units to third parties offset by increases in parts and
labor sales.  Because our compressor  units are  custom-built,  fluctuations  in
revenue from outside sources are expected.

         The gross margin  percentage  increased  from 37% for the twelve months
ended  December 31, 2002 to 40% for the same period in 2003. The cost of revenue
is comprised of expenses  associated  with the maintenance of the gas compressor
rental activity,  service,  parts,  and  manufacturing  expenses.  This increase
resulted mainly from an increase in service and parts revenues.

         Selling, general and administrative expense increased by 18% or $49,000
for the twelve months ended December 31, 2003, as compared to the same period in
2002.  This is mainly the result of an increase in advertising  and  promotional
expenses.

         Depreciation  expense  increased  from  $558,000 for the twelve  months
ended  December  31, 2002,  to $662,000  for the same period ended  December 31,
2003. The increase is the result of equipment that was added to the rental fleet
and the replacement of several service vehicles.

         There was a decrease in interest  expense of 70% from  $537,000 for the
twelve  months ended  December 31, 2002 to $162,000 for the twelve  months ended
December 31, 2003.  This decrease  resulted from a reduction of the debt owed to
Dominion  Michigan.  Part of the proceeds from our initial  public  offering was
used to  reduce  debt in the  amount of  $3,452,464  and our bank  financed  the
remaining balance of $3,500,000 at a more favorable interest rate.


                                       18


         Natural Gas Services Group

         Selling, general and administrative expense increased 77% from $497,000
for the twelve  months ended  December 31, 2002, as compared to $878,000 for the
same period ended  December  31,  2003.  This was mainly the result of the added
expense  associated  with  being a publicly  held  company  such as legal  fees,
auditor fees, underwriters and public relations fees.

         Amortization  and depreciation  expense  decreased 47% from $47,000 for
the twelve months ended  December 31, 2002, to $25,000 for the same period ended
December 31, 2003.  This mainly  resulted  from  vehicles that were moved to our
then subsidiary, Great Lakes Compression.

         Interest expense decreased 39% from $38,000 for the twelve months ended
December 31, 2002, to $23,000 for the same period ended December 31, 2003.  This
decrease  resulted from a reduction in the interest rate and from bank notes for
vehicles moved to our then subsidiary.

         Provision  for income tax is  accounted  for on a  consolidated  basis.
Therefore, the tax for all companies is included in the provision for income tax
for us.  Income tax expense  increased  $113,000,  or 19%,  primarily due to the
increase in net taxable income.

Critical Accounting Policies and Practices

         We have  identified  the  policies  below as critical  to our  business
operations and the  understanding of our results of operations.  In the ordinary
course of business,  we have made a number of estimates and assumptions relating
to the  reporting  of results  of  operations  and  financial  condition  in the
preparation of our financial statements in conformity with accounting principles
generally   accepted  in  the  United   States.   Actual  results  could  differ
significantly  from those estimates under different  assumptions and conditions.
We believe that the following  discussion addresses our most critical accounting
policies,  which are  those  that are most  important  to the  portrayal  of our
financial  condition and results of operations  and require our most  difficult,
subjective,  and  complex  judgments,  often  as a  result  of the  need to make
estimates about the effect of matters that are inherently uncertain.

         Our critical accounting policies are as follows:

         o        revenue recognition;

         o        estimating the allowance for doubtful accounts;

         o        accounting for income taxes;

         o        valuation of long-lived  and  intangible  assets and goodwill;
                  and

         o        valuation of inventory



                                       19


Revenue recognition

         We recognize  revenue from sales of compressors or flare systems at the
time of shipment and passage of title when collectability is reasonably assured.
We also offer certain of our customers the right to return  products that do not
function properly within a limited time after delivery.  We continuously monitor
and track such  product  returns  and we record a  provision  for the  estimated
amount  of  such  future  returns,   based  on  historical  experience  and  any
notification we receive of pending returns. While such returns have historically
been within our expectations and the provisions established, we cannot guarantee
that we will  continue to  experience  the same return rates that we have in the
past. Any significant increase in product failure rates and the resulting credit
returns could have a material  adverse  impact on our operating  results for the
period or periods in which such returns occur.

         When product is billed to customers  based on  contractual  agreements,
but has not yet been shipped, payments are recorded as deferred revenue, pending
shipment.

         Rental  and  lease  revenue  are  recognized  over  the  terms  of  the
respective lease agreements based upon the classification of the lease.

         Service  and  maintenance  revenue  is  recognized  as the  service  is
provided or over the term of the agreement, as applicable.

Allowance for doubtful accounts receivable

         We perform  ongoing  credit  evaluations  of our  customers  and adjust
credit  limits  based upon payment  history and the  customer's  current  credit
worthiness, as determined by our review of their current credit information.  We
continuously  monitor collections and payments from our customers and maintain a
provision for estimated  credit losses based upon our historical  experience and
any specific  customer  collection  issues that we have  identified.  While such
credit losses have  historically been within our expectations and the provisions
established,  we cannot  guarantee  that we will continue to experience the same
credit loss rates that we have in the past. Since 38% of our accounts receivable
are  concentrated  in  approximately  two  customers  at December  31,  2003,  a
significant  change in the  liquidity or financial  position of any one of these
customers  could have a material  adverse  impact on the  collectability  of our
accounts receivables and our future operating results.

Accounting for income taxes

         As  part  of  the  process  of  preparing  our  consolidated  financial
statements  we are  required to estimate  our  Federal  income  taxes as well as
income taxes in each of the states in which we operate. This process involves us
estimating  our actual current tax exposure  together with  assessing  temporary
differences  resulting from differing  treatment of items for tax and accounting
purposes. These differences result in deferred tax assets and liabilities, which
are  included  in our  consolidated  balance  sheet.  We must  then  assess  the



                                       20


likelihood  that our deferred tax assets will be recovered  from future  taxable
income and to the extent we  believe  that  recovery  is not  probable,  we must
establish  a  valuation  allowance.  To the  extent  we  establish  a  valuation
allowance or increase this allowance in a period,  we must include an expense in
the tax provision in the statement of operations.

         Significant   management   judgment  is  required  in  determining  our
provision  for income  taxes,  our deferred tax assets and  liabilities  and any
valuation allowance recorded against our net deferred tax assets.

Valuation of long-lived and intangible assets and goodwill

         We assess the impairment of identifiable intangibles, long-lived assets
and related goodwill  whenever events or changes in circumstances  indicate that
the carrying value may not be recoverable.  Factors we consider  important which
could trigger an impairment review include the following:

         o        significant  underperformance  relative to expected historical
                  or projected future operating results;

         o        significant  changes in the manner of our use of the  acquired
                  assets or the strategy for our overall business; and

         o        significant negative industry or economic trends;

         When we determine  that the carrying value of  intangibles,  long-lived
assets and related  goodwill may not be recoverable  based upon the existence of
one or more of the above  indicators of  impairment,  we measure any  impairment
based  on a  projected  discounted  cash  flow  method  using  a  discount  rate
determined by our  management to be  commensurate  with the risk inherent in our
current business model.

         In 2002,  Statement of Financial  Accounting Standards ("FAS") No. 142,
"Goodwill and Other  Intangible  Assets"  became  effective and as a result,  we
ceased to amortize approximately $2.6 million of goodwill as of January 1, 2002.
In lieu of amortization,  we are required to perform an annual impairment review
of our  goodwill.  Based  upon  valuations  in July 2002 and June  2003,  of our
reporting  units with  goodwill,  we did not record an impairment  charge during
either year.

Inventories

         We value our  inventory  at the lower of the  actual  cost to  purchase
and/or  manufacture the inventory or the current  estimated  market value of the
inventory.  We  regularly  review  inventory  quantities  on hand  and  record a
provision  for excess and obsolete  inventory  based  primarily on our estimated
forecast of product demand and production requirements.



                                       21


Recently Issued Accounting Pronouncements

         In December  2002,  the FASB issued  Statement of Financial  Accounting
Standards  No.148,  Accounting  for  Stock-Based  Compensation  - Transition and
Disclosure - an Amendment of FASB  Statement  123, or FAS 148. For entities that
change their accounting for stock-based  compensation  from the intrinsic method
to the fair value  method  under FAS 123, the fair value method is to be applied
prospectively  to those  awards  granted  after the  beginning  of the period of
adoption,   the  prospective   method.  The  amendment  permits  two  additional
transition  methods for  adoption of the fair value  method.  In addition to the
prospective  method,  the entity can choose to either (i)  restate  all  periods
presented,  retroactive  restatement method, or (ii) recognize compensation cost
from the  beginning  of the fiscal year of adoption as if the fair value  method
had been used to account for awards,  modified  prospective  method.  For fiscal
years  beginning  December 15, 2003,  the  prospective  method will no longer be
allowed.  We currently account for stock-based  compensation using the intrinsic
value  method as  proscribed  by  Accounting  Principles  Board  Opinion No. 25,
Accounting  for Stock Issued to  Employees,  and plan on  continuing  using this
method to account for stock  options;  therefore,  we do not intend to adopt the
transition  requirements  as  specified  in FAS 148. We adopted  the  disclosure
requirements of FAS 148 as of December 31, 2002.

         In June  2003,  the FASB  approved  SFAS 150,  Accounting  for  Certain
Financial  Instruments with Characteristics of Both Liabilities and Equity. SFAS
150  establishes  standards for how an issuer  classifies  and measures  certain
financial  instruments with characteristics of both liabilities and equity. This
statement is effective for financial  instruments entered into or modified after
May 31, 2003,  and  otherwise  was  effective at the  beginning of the Company's
third  quarter  of fiscal  2003.  Implementation  of SFAS 150 did not affect the
Company's financial position.

Seasonality and Economic Conditions

         Our  sales  are  affected  by the  timing of  planned  development  and
construction projects by energy industry customers.

         We do not believe that inflation had a material impact upon our results
of operations  during the year ended December 31, 2003, or during the year ended
December 31, 2002.

Liquidity and Capital Resources

         We have funded our operations  through public and private  offerings of
our common and preferred  stock,  subordinated  debt, and bank debt. At December
31, 2003, we had cash and cash equivalents of approximately  $176,000, a working
capital deficit of approximately  $288,000 and debt of approximately  $9,014,000
of  which   approximately   $2,364,000  was   classified  as  current.   We  had
approximately  $3,024,000 of net cash flow from operating  activities during the
twelve months ending  December 31, 2003.  This was primarily  from net income of
approximately  $1,307,000 plus  depreciation  and  amortization of approximately
$1,726,000  and  increases  in deferred  taxes of  approximately  $672,000,  and
decrease in accounts receivable of approximately $391,000.



                                       22


Market Risk

         We significantly rely upon debt financing provided by various financial
institutions.  Most of these instruments contain interest provisions that are at
least a  percentage  point  above  the  published  prime  rate.  This  creates a
vulnerability to us relative to the movement of the prime rate. Should the prime
rate increase,  our cost of funds will increase and affect our ability to obtain
additional  debt.  We have not engaged in any hedging  activities to offset such
risks.

Risk Factors

         You  should  carefully  consider  the  following  risks.  The risks and
uncertainties  described below are not the only ones facing us. Additional risks
and  uncertainties  that are not presently known to us or that we currently deem
immaterial may also impair our business.

         If any of the events  described in the following  risks actually occur,
our business,  financial condition and results of operations could be materially
adversely  affected.  In such case,  the trading  prices of our common  stock or
warrants could decline and you could lose all or part of your investment.

Our  current  debt is large and may  negatively  impact our  current  and future
financial stability.

         As of December 31, 2003 we had an aggregate of approximately $9,014,000
of outstanding  indebtedness not including accounts payable and accrued expenses
of approximately  $1,071,000.  As a result of our significant  indebtedness,  we
might not have the ability to incur any substantial additional indebtedness. The
level of our  indebtedness  could have several  important  effects on our future
operations, including:

         o        our  ability  to  obtain  additional   financing  for  working
                  capital, acquisitions, capital expenditures and other purposes
                  may be limited;

         o        a significant  portion of our cash flow from operations may be
                  dedicated  to the  payment of  principal  and  interest on our
                  debt, thereby reducing funds available for other purposes; and

         o        our  significant  leverage  could make us more  vulnerable  to
                  economic downturns.

If we are unable to service our debt,  we will likely be forced to take remedial
steps that are contrary to our business plan.

         As of December 31, 2003,  our debt service  requirements  on a monthly,
quarterly  and  annual  basis  were  approximately   $223,000,   $670,000,   and
$2,681,000,  respectively.  It is possible  that our business  will not generate
sufficient cash flow from operations to meet our debt service  requirements  and
the payment of principal when due. If this were to occur, we may be forced to:



                                       23


         o        sell assets at disadvantageous prices;

         o        obtain additional financing; or

         o        refinance all or a portion of our  indebtedness  on terms that
                  may be very unfavorable to us.

Our current bank loan contains  covenants that limit our operating and financial
flexibility and, if breached, could expose us to severe remedial provisions.

         Under the terms of the bank loan, we must:

         o        comply with a debt to asset ratio;

         o        maintain minimum levels of tangible net worth;

         o        not exceed specified levels of debt;

         o        comply with a cash flow to fixed charges ratio;

         o        comply with a debt to net worth ratio; and

         o        not incur additional debt over a specified amount.

         Our ability to meet the financial  ratios and tests under our bank loan
can be affected by events beyond our control,  and we may not be able to satisfy
those  ratios  and  tests.  A  breach  under  either  could  permit  the bank to
accelerate  the  debt so that it is  immediately  due and  payable.  No  further
borrowings  would be available under the credit  facility.  If we were unable to
repay the debt, the bank could proceed against our assets.

Approximately 70% of our compressor leases are leased for terms of six months or
less that, if terminated,  would adversely impact our revenue and our ability to
recover our initial equipment costs.

         Approximately  70% of our compressor  leases are for terms of up to six
months.  There is a possibility that these leases could be terminated by lessees
within short  periods of time and that we may not be able to recover the cost of
the compressor for which a lease is terminated.

The  anticipated  revenue  from the  affiliate  of Dominion  Michigan  cannot be
guaranteed.



                                       24


         In connection with our acquisition of the compression related assets of
Dominion  Michigan,  an  affiliate  of Dominion  Michigan  committed to purchase
compressors  from us or enter  into five  year  leases  of  compressors  with us
totaling  five-thousand  horsepower.  If, for any reason, the affiliate does not
fulfill  this  obligation  to  any  material  extent,  our  cash  flow  will  be
significantly reduced and we may not be able to pay the principal or interest on
our debt as it becomes due.

We rely on one customer for a significant amount of our business and the loss of
this customer could adversely  affect our operating  results and lower the price
of our common stock

         During the years ended December 2003 and 2002,  Dominion  Exploration &
Production,  Inc.  accounted for  approximately  28% and 30% of our consolidated
revenue,  respectively.  The loss of Dominion  Exploration  as a customer  could
cause our  operating  results to fall below market  analysts'  expectations  and
lower the price of our common stock.

We are dependent on a few suppliers for some of our  compressor  components  and
the loss of one of these suppliers could cause a delay in the  manufacturing  of
our compressors and reduce our revenue.

         We currently obtain approximately 23% of our compressor components from
two suppliers.  We order from these suppliers as needed and we have no long-term
contracts with any of these suppliers. If any of these of these suppliers should
curtail its operations or be unable to meet our needs, we would encounter delays
in supplying our customers with compressors  until an alternative  supplier,  if
any, could be found. Such delays in our  manufacturing  process could reduce our
revenue and negatively impact our relationships with customers.

Decreased oil and gas industry  expenditure  levels would  adversely  affect our
revenue.

         Our revenue is derived  from  expenditures  in the oil and gas industry
which, in turn, are based on budgets to explore for, develop and produce oil and
natural  gas. If these  expenditures  decline,  our  revenue  will  suffer.  The
industry's willingness to explore,  develop and produce depends largely upon the
prevailing view of future oil and gas prices. Many factors affect the supply and
demand for oil and gas and, therefore, influence product prices including:

         o        the level of oil and gas production;

         o        the levels of oil and gas inventories;

         o        the expected cost of developing new reserves;

         o        the cost of producing oil and gas;

         o        the level of drilling activity;

         o        inclement weather;



                                       25


         o        worldwide economic activity;

         o        regulatory  and other  federal and state  requirements  in the
                  United States;

         o        the  ability  of  the  Organization  of  Petroleum   Exporting
                  Countries to set and maintain production levels and prices for
                  oil;

         o        terrorist activities in the United States and elsewhere;

         o        the cost of developing alternate energy sources;

         o        environmental regulation; and

         o        tax policies.

         If  the  demand  for  oil  and  gas  decreases,  then  demand  for  our
compressors likely will decrease.

The intense  competition in our industry  could result in reduced  profitability
and loss of market share for us.

         We sell or lease our  products  and sell our  services  in  competitive
markets.  In most of our  business  segments,  we  compete  with the oil and gas
industry's  largest  equipment  and  service  providers  who have  greater  name
recognition  than  we  do.  These  companies  also  have  substantially  greater
financial  resources,  larger  operations  and greater  budgets  for  marketing,
research  and  development  than we do.  They may be better  able to  compete in
making  equipment  available  quickly  and more  efficiently,  meeting  delivery
schedules or reducing  prices.  As a result,  we could lose customers and market
share to those  competitors.  These companies may also be better positioned than
us to successfully endure down turns in the oil and gas industry.

         Our operations may be adversely affected if our current  competitors or
new market  entrants  introduce  new  products or services  with better  prices,
features, performance or other competitive characteristics than our products and
services.  Competitive pressures or other factors also may result in significant
price competition that could harm our revenue and our business.

We might be unable to employ adequate  technical  personnel,  which could hamper
our plans for expansion or increase our costs.

         Many of the compressors  that we sell or lease are technically  complex
and often must perform in harsh conditions.  We believe that our success depends
upon our ability to employ and retain a sufficient number of technical personnel
who have the ability to design, utilize, enhance and maintain these compressors.
Our ability to expand our operations  depends in part on our ability to increase
our skilled  labor force.  The demand for skilled  workers is high and supply is
limited. A significant  increase in the wages paid by competing  employers could
result in a  reduction  of our  skilled  labor force or cause an increase in the
wage rates that we must pay or both.  If either of these  events  were to occur,
our cost structure could increase and our operations and growth  potential could
be impaired.



                                       26


If we do not develop, produce and commercialize new competitive technologies and
products, our revenue may decline.

         The markets for natural gas  compressor  products  and services and for
flare  systems,  ignition  systems  and  components  for  plant  and  production
facilities  are  characterized  by continual  technological  developments.  As a
result,  substantial  improvements in the scope and quality of product  function
and  performance  can occur over a short  period of time.  If we are not able to
develop  commercially  competitive  products  in a timely  manner in response to
changes in technology, our business and revenue may be adversely affected.

         We  may  encounter   financial   constraints   or  technical  or  other
difficulties  that could delay  introduction of new products and services in the
future.  Our  competitors  may introduce new products before we do and achieve a
competitive advantage.

         Additionally,  the time and expense invested in product development may
not result in commercial applications that provide revenue. We could be required
to write  off our  entire  investment  in a new  product  that  does  not  reach
commercial  viability.  Moreover,  we may experience  operating losses after new
products are  introduced  and  commercialized  because of high  start-up  costs,
unexpected manufacturing costs or problems, or lack of demand.

We are  subject  to  extensive  environmental  laws and  regulations  that could
require us to take  costly  compliance  actions  that  could harm our  financial
condition.

         Our manufacturing and maintenance operations are significantly affected
by stringent and complex federal, state and local laws and regulations governing
the  discharge of  substances  into the  environment  or  otherwise  relating to
environmental  protection. In these operations, we generate and manage hazardous
wastes such as solvents,  thinner,  waste paint, waste oil, washdown wastes, and
sandblast material.  We attempt to use generally accepted operating and disposal
practices and, with respect to acquisitions, will attempt to identify and assess
whether there is any environmental risk before completing an acquisition.  Based
on the nature of the industry,  however,  hydrocarbons  or other wastes may have
been disposed of or released on or under properties  owned,  leased, or operated
by us or on or under  other  locations  where  such  wastes  have been taken for
disposal.  The waste on these  properties  may be  subject  to  federal or state
environmental laws that could require us to remove the wastes or remediate sites
where they have been  released.  We could be exposed to  liability  for  cleanup
costs,  natural  resource  and other  damages as a result of our  conduct or the
conduct of, or  conditions  caused by, prior  operators or other third  parties.
Environmental laws and regulations have changed in the past, and they are likely
to change in the future.  If existing  regulatory  requirements  or  enforcement
policies change,  we may be required to make significant  unanticipated  capital
and operating expenditures.



                                       27


         Any  failure by us to comply  with  applicable  environmental  laws and
regulations  may result in governmental  authorities  taking actions against our
business that could harm our operations and financial condition, including the:

         o        issuance of administrative, civil and criminal penalties;

         o        denial or revocation of permits or other authorizations;

         o        reduction or cessation in operations; and

         o        performance   of  site   investigatory,   remedial   or  other
                  corrective actions.

We  could be  subject  to  substantial  liability  claims  that  could  harm our
financial condition.

         Our products are used in hazardous drilling and production applications
where an accident or a failure of a product can cause personal  injury,  loss of
life,  damage to  property,  equipment  or the  environment,  or  suspension  of
operations.

         While we maintain insurance coverage, we face the following risks under
our insurance coverage:

         o        we may  not  be  able  to  continue  to  obtain  insurance  on
                  commercially reasonable terms;

         o        we may be faced  with  types of  liabilities  that will not be
                  covered by our  insurance,  such as damages  from  significant
                  product liabilities and from environmental contamination;

         o        the  dollar  amount of any  liabilities  may exceed our policy
                  limits; and

         o        we do not maintain  coverage  against the risk of interruption
                  of our business.

         Any claims  made under our policy  will  likely  cause our  premiums to
increase.  Any future  damages  caused by our products or services  that are not
covered  by  insurance,  are in  excess  of  policy  limits  or are  subject  to
substantial  deductibles,  would reduce our earnings and our cash  available for
operations.

Liability to customers under  warranties may materially and adversely affect our
earnings.

         We provide  warranties as to the proper  operation and  conformance  to
specifications  of the  equipment we  manufacture.  Our equipment is complex and
often  deployed  in harsh  environments.  Failure of this  equipment  to operate
properly  or  to  meet  specifications  may  increase  our  costs  by  requiring
additional  engineering  resources  and  services,   replacement  of  parts  and
equipment or monetary  reimbursement to a customer. We have in the past received
warranty claims and we expect to continue to receive them in the future.  To the
extent that we incur substantial  warranty claims in any period, our reputation,
our ability to obtain future  business and our earnings  could be materially and
adversely affected.



                                       28


Loss of key members of our management  could adversely affect our business while
we attempt to find their replacements.

         We depend on the continued  employment  and  performance  of Wallace C.
Sparkman,  our interim President since the death of Wayne Vinson,  Earl R. Wait,
our  Treasurer  and  Chief  Financial  Officer,  and other  key  members  of our
management.  If any of our key managers resigns or becomes unable to continue in
his present role and is not adequately  replaced,  our business operations could
be materially adversely affected.

We are  reliant on our current  customers  for future cash flows and the loss of
one or more of our  current  customers  could  adversely  affect our  results of
operations.

         Our business is dependent  not only on securing new  customers but also
on maintaining current customers.  Dominion  Exploration & Production,  Inc., an
affiliate of Dominion  Resources,  Inc.,  accounted  for  approximately  28% and
approximately 35% of our consolidated revenue during the year ended December 31,
2003 and the year ended December 31, 2002, respectively. The loss of one or more
of our  significant  customers  would have an adverse  effect on our revenue and
results of operations.

Provisions  contained in our  governing  documents  could hinder a change in our
control.

         Our articles of  incorporation  and bylaws contain  provisions that may
discourage acquisition bids and may limit the price investors are willing to pay
for our common  stock and  warrants.  Our articles of  incorporation  and bylaws
provide that:

         o        directors   will  be  elected  for  three-year   terms,   with
                  approximately one-third of the board of directors standing for
                  election each year;

         o        cumulative  voting is not allowed  which limits the ability of
                  minority shareholders to elect any directors;

         o        the   unanimous   vote  of  the  board  of  directors  or  the
                  affirmative  vote of the  holders  of not less than 80% of the
                  votes  entitled  to be  cast  by the  holders  of  all  shares
                  entitled to vote in the  election of  directors is required to
                  change the size of the board of directors; and

         o        directors may only be removed for cause by holders of not less
                  than 80% of the votes entitled to be cast on the matter.

         Our board of  directors  has the  authority to issue up to five million
shares  of  preferred  stock.  The board of  directors  can fix the terms of the
preferred stock without any action on the part of our shareholders. The issuance
of  shares  of  preferred  stock  may  delay  or  prevent  a change  in  control
transaction.  In addition,  preferred stock could be used in connection with the



                                       29


board of  director's  adoption of a  shareholders'  rights plan (also known as a
poison  pill),  which  would make it much more  difficult  to effect a change in
control of our company through acquiring or controlling  blocks of stock.  Also,
after  completion of this  offering,  our directors and officers as a group will
continue  to  beneficially  own stock.  Although  this is not a majority  of our
stock,  it confers  substantial  voting power in the  election of directors  and
management  of our  company.  This would make it  difficult  for other  minority
shareholders,  such as the  investors  in this  offering,  to effect a change in
control or otherwise  extend any significant  control over the management of our
company.  This may  adversely  affect the market  price and  interfere  with the
voting and other rights of our common stock.

If our common stock does not trade for a certain price per share,  our preferred
stock will not automatically convert into our common stock.

         Our currently  outstanding  343,654 shares of 10% Convertible  Series A
Preferred  Stock will  automatically  convert into shares of our common stock if
our common stock trades at or above $6.50 per share for 20  consecutive  trading
days. Until such event occurs, we will be required to:

         o        continue to pay the preferred stock dividend;

         o        permit the preferred stock holders to vote as a separate class
                  where required by Colorado law; and

         o        pay the  holders  of  preferred  stock a  preference  upon our
                  liquidation.

         The same consequences would likely result from any additional preferred
stock that our board of directors may  authorize for issuance in the future,  as
well as additional rights and preferences that could be included in the terms of
the preferred stock. As of February 29, 2004, our common stock has not traded at
the  required  threshold  in order to trigger the  automatic  conversion  of the
preferred stock.

We will have a  comparatively  low number of shares of common stock and warrants
outstanding  and,  therefore,  our common  stock and  warrants  may suffer  from
limited  liquidity  and their prices will likely be volatile and their value may
be adversely affected.

         Because the number of freely  transferable  shares of our common  stock
and number of our warrants  will be low, the trading  prices of our common stock
and  warrants  will  likely be subject to  significant  price  fluctuations  and
limited  liquidity.  This may adversely affect the value of your investment.  In
addition,  our common stock and  warrants  could be subject to  fluctuations  in
response to variations in quarterly  operating  results,  changes in management,
future  announcements  concerning  us,  general trends in the industry and other
events or factors as well as those described above.



                                       30


We must evaluate our intangible assets annually for impairment.

         Our   intangible   assets  are   recorded  at  cost  less   accumulated
amortization  and consist of goodwill  and patent  costs.  Through  December 31,
2001,  goodwill was amortized using the  straight-line  method over 15 years and
patent costs were amortized over 13 to 15 years.

         In June 2001, the Financial Accounting Standards Board issued Statement
of  Financial  Accounting  Standards  No. 142,  "Goodwill  and Other  Intangible
Assets."  FAS  142  provides  that:  1)  goodwill  and  intangible  assets  with
indefinite lives will no longer be amortized;  2) goodwill and intangible assets
with indefinite  lives must be tested for impairment at least  annually;  and 3)
the amortization  period for intangible  assets with finite lives will no longer
be limited to forty years. In the event that we determine our intangible  assets
with indefinite  lives have been impaired,  we must record a write-down of those
assets on our  statement  of  operations  during the period of  impairment.  Our
determination of impairment will be based on various  factors,  including any of
the following factors, if they materialize:

         o        significant  underperformance  relative to expected historical
                  or projected future operating results;

         o        significant  changes in the manner of our use of the  acquired
                  assets or the strategy for our overall business;

         o        significant negative industry or economic trends;

         o        significant decline in our stock price for a sustained period;
                  and

         o        our market capitalization relative to net book value.

         We  adopted  FAS 142 as of January  1,  2002.  Based on an  independent
valuation  in July  2002 and June 2003 of our  reporting  units  with  goodwill,
adoption  of FAS 142 did not have a  material  adverse  effect  on us in 2002 or
2003. In the future it could result in impairments  of our intangible  assets or
goodwill.  We expect to continue to amortize our  intangible  assets with finite
lives  over the same  time  periods  as  previously  used,  and we will test our
intangible  assets with indefinite lives for impairment at least once each year.
In addition,  we are required to assess the consumptive  life, or longevity,  of
our intangible  assets with finite lives and adjust their  amortization  periods
accordingly.  Our net  intangible  assets were  recorded on our balance sheet at
approximately  $2,704,000  as of December 31,  2003,  and we expect the carrying
value  of net  intangible  assets  will  increase  significantly  if we  acquire
additional  businesses.  Any impairments in future periods of those assets, or a
reduction in their consumptive  lives, could materially and adversely affect our
statement of operations and financial position.

Item 7. FINANCIAL STATEMENTS

         See Financial Statements beginning on page F-1.



                                       31



Item  8.  CHANGES  IN AND  DISAGREEMENTS  WITH  ACCOUNTANTS  ON  ACCOUNTING  AND
FINANCIAL DISCLOSURE

         We did not change our principal  independent  accountant  for the years
ended December 31, 2003 or December 31, 2002.

Item 8A. CONTROLS AND PROCEDURES

         Under the  supervision  and with the  participation  of our management,
including our chief executive officer and our principal  accounting  officer, we
have evaluated the effectiveness of our disclosure controls and procedures as of
December 31, 2003. They have concluded that these  disclosure  controls  provide
reasonable  assurance that we can collect process and disclose,  within the time
periods specified in the Commission's rules and forms, the information  required
to be disclosed in our periodic Exchange Act reports.

         There have been no significant  changes in our internal  controls or in
other factors that could  significantly  affect our internal controls subsequent
to the date of their most recent evaluation.
























                                       32


                                    PART III

ITEM 9. DIRECTORS, EXECUTIVE OFFICERS, PROMOTERS AND CONTROL PERSONS; COMPLIANCE
WITH SECTION 16(a) OF THE EXCHANGE ACT.

Executive Officers and Directors

         The table below contains  information about our executive  officers and
directors:

         Name                                 Age    Position
         ----                                 ---    --------

         Wallace O. Sellers(1)(2)(3)          74     Director, Chairman
         Wallace C. Sparkman(5)               73     Director, Interim President
                                                     and Chief Executive Officer
         Charles G. Curtis(1)(2) (3)          71     Director
         William F. Hughes, Jr. (1)(2) (3)    51     Director
         Gene A. Strasheim(1)(2)(3)(4)        62     Director
         Richard L. Yadon(1)(2)(3)            45     Director
         Earl R. Wait                         60     Chief Financial Officer and
                                                     Treasurer
         Ronald D. Bingham                    59     Vice President
         S. Craig Rogers                      41     Vice President
         Scott W. Sparkman(5)                 42     Secretary
         ---------------------

         (1) Member of our audit committee
         (2) Member of our compensation committee
         (3) Member of our nominating committee
         (4) Gene A.  Strasheim has been determined by our Board of Directors to
             be the financial  expert on our audit  committee.  Mr. Strasheim is
             independent as that term is used in Item 7 (d)(3)(iv) of Schedule A
             of the Exchange Act.
         (5) Wallace C. Sparkman is the father of Scott W. Sparkman.

         The  Board of  Directors  has been  divided  into  three  classes  with
directors serving staggered three-year terms. With respect to the existing Board
of Directors,  the terms of Messrs. Hughes (who replaced James T. Grigsby on the
Board of  Directors),  Sparkman (who replaced  Scott W. Sparkman on the Board of
Directors),  and Yadon  will  expire in 2004 and the  terms of  Messrs.  Curtis,
Sellers and Strasheim  will expire in 2005. All officers serve at the discretion
of the Board of Directors.

         The following sets forth biographical information for at least the past
five years for our directors and executive officers.

         Wallace O.  Sellers is one of our founders and has served as a director
and the Chairman of our Board of Directors  since December 17, 1998. Mr. Sellers
was the  Chairman  of the Board of  Directors  of Great Lakes  Compression  from
February  2001 to December 31, 2003.  Although Mr.  Sellers  retired in December
1994,  he served as  Vice-Chairman  of the Board and  Chairman of the  Executive
Committee of Enhance Financial  Services,  Inc., a financial guaranty reinsurer,
from January 1995 to 2001.  From November 1986 to December 1991 he was President
and Chief  Executive  Officer  of  Enhance.  From 1951 to 1986 Mr.  Sellers  was




                                       33



employed by Merrill Lynch,  Pierce,  Fenner & Smith Incorporated,  an investment
banker, in various capacities, including Director of the Municipal and Corporate
Bond  Division and Director of the  Securities  Research  Division.  Immediately
prior to his retirement  from Merrill Lynch,  he served as Senior Vice President
and Director of Strategic Development. Mr. Sellers received a BA degree from the
University of New Mexico, an MA degree from New York University and attended the
Advanced  Management Program at Harvard  University.  Mr. Sellers is a Chartered
Financial Analyst.

         Wallace C. Sparkman is one of our founders and has served as a director
since 2003.  He was appointed  Interim  President  and Chief  Executive  Officer
following  the death of Wayne  Vinson in March 2004 until our Board of Directors
appoints a new  President  and Chief  Executive  Officer.  Mr.  Sparkman was the
President  of NGE from July 2001 to December  31,  2003,  a director of NGE from
February  1996 to  December  31,  2003,  and the  President  of Rotary  (and its
predecessor,  Flare King) from April 1993 to April 1997. Mr.  Sparkman served as
our  President  from May 2000 to July 2001 and as the  President  of Great Lakes
Compression  from February 2001 to July 2001. Mr. Sparkman was Vice President of
NGE from  February  1996 to  November  1999.  From  December  1998 to 2003,  Mr.
Sparkman  was a consultant  to our Board of  Directors.  From 1985 to 1998,  Mr.
Sparkman  acted as a management  consultant  to various  entities and acted as a
principal  in forming  several  privately-owned  companies.  Mr.  Sparkman was a
co-founder  of  Sparkman  Energy  Corporation,   a  natural  gas  gathering  and
transmission company, in 1979 and served as its Chairman of the Board, President
and Chief Executive Officer until 1985 when ownership control changed. From 1968
to 1979, Mr. Sparkman held various executive  positions and served as a director
of Tejas Gas Corporation,  a natural gas gathering and transmission  company. At
the time of his resignation from Tejas Gas Corporation in 1979, Mr. Sparkman was
President and Chief  Executive  Officer.  Mr. Sparkman has more than 34 years of
experience in the energy service industry.

         Charles G. Curtis has been one of our directors since April 2001. Since
1992,  Mr. Curtis has been the President and Chief  Executive  Officer of Curtis
One, Inc.  d/b/a/ Roll Stair, a manufacturer of aluminum and steel mobile stools
and mobile  ladders.  From 1988 to 1992,  Mr. Curtis was the President and Chief
Executive Officer of Cramer, Inc. a manufacturer of office furniture. Mr. Curtis
has a B.S.  degree from the United  States Naval  Academy and a MSAE degree from
the University of Southern California.

         William F. Hughes,  Jr. has been one of our  directors  since  December
2003.  Since 1983,  Mr. Hughes has been co-owner of The Whole  Wheatery,  LLC, a
natural  foods  store  located in  Lancaster,  California.  Mr.  Hughes  holds a
Bachelor of Science degree in Civil  Engineering from the U.S. Air Force Academy
and a Masters of Science in Engineering from UCLA.




                                       34


         Gene A. Strasheim has served as one of our directors since 2003.  Since
2001,   Mr.   Strasheim   has   been   a   financial   consultant   to   Skyline
Electronics/Products,  a  manufacturer  of  circuit  boards  and large  remotely
controlled  digital  interstate  highway signs. From 1992 to 2001, Mr. Strasheim
was the Chief Financial  Officer of Skyline  Electronics/Products.  From 1985 to
1992, Mr. Strasheim was the Vice  President-Finance  and Treasurer of CF&I Steel
Corporation. Prior to that, Mr. Strasheim was the Vice President-Finance for two
companies and was a partner with Deloitte  Haskins & Sells,  a large  accounting
firm. Mr. Strasheim  practiced as a Certified Public  Accountant in three states
and has a BS degree from the University of Wyoming.

         Richard L. Yadon has served as one of our  directors  since  2003.  Mr.
Yadon is one of the original founders of Rotary and served as advisor to Natural
Gas' Board of Directors  from June 2002 to June 2003.  Since 1981, Mr. Yadon has
owned and operated Yadeco Pipe & Equipment and since December 1994, has co-owned
and presided as President of Midland Pipe & Equipment,  Inc. Both  companies are
directly  related to drilling and completion of oil and gas wells in Texas,  New
Mexico, Louisiana and Oklahoma. Since 1981, he has owned Yadon Properties, which
owns and  operates  real estate in  Midland,  Texas.  Mr.  Yadon has 22 years of
experience in the energy service industry.

         Earl R. Wait has served as our Chief  Financial  Officer since May 2000
and our Treasurer  since 1998.  Mr. Wait was our Chief  Accounting  Officer from
1998  to  May   2000.   Mr.   Wait  was  the   Chief   Financial   Officer   and
Secretary/Treasurer  of Flare King and then  Rotary  from April 1993 to December
31, 2003, the Controller and Assistant Secretary/Treasurer for Hi-Tech from 1994
to 1999, a director of NGE and Rotary from July 1999 to April 2001 and the Chief
Accounting  Officer and Treasurer of Great Lakes  Compression from February 2001
to December 31, 2003. Mr. Wait is a certified  public  accountant with an MBA in
management and has more than 25 years of experience in the energy industry.

         Ronald  D.  Bingham  has  served  as one of our Vice  Presidents  since
December  2003 and was the  President  of Great Lakes  Compression  from 2001 to
December 31,  2003.  From March 2001 to July 2001,  Mr.  Bingham was the General
Manager of Great Lakes Compression. From January 1989 to March 2001, Mr. Bingham
was the District Manager for Waukesha Pearce Industries,  Inc., a distributor of
Waukesha  natural gas engines.  Mr.  Bingham is a member of the Michigan Oil and
Gas Association and received a bachelors degree in Graphic Arts from Sam Houston
State University.

         S. Craig  Rogers has  served as one of our Vice  Presidents  since June
2003. He served as Operations Manager for Rotary from 1995 to December 31, 2003,
and Vice  President of Rotary from April 2002 to December  31, 2003.  From March
1987 to  January  1995,  Mr.  Rogers  was the  Shop  Manager  for  CSI,  a major
manufacturer of natural gas compressors.

         Scott W. Sparkman has served as our Secretary  since December 1998. Mr.
Sparkman  was  Executive  Vice-President  of NGE from July 2001 to December  31,
2003,  was a director  of NGE from  December  1998 to  December  31,  2003,  was
Secretary  and Treasurer of NGE from March 1999 to December 31, 2003 and was the
Secretary of Great Lakes  Compression  from  February 2001 to December 31, 2003.
Mr.  Sparkman was one of our directors from 1998 to 2003. Mr. Sparkman served as


                                       35


the  President  of NGE from  December  1998 to July 2001.  From May 1997 to July
1998,  Mr.  Sparkman  served as Project  Manager and  Comptroller  for  Business
Development  Strategies,  Inc., a designer of internet  websites.  Mr.  Sparkman
pursued  personal  business  interests from May 1996 to May 1997.  From February
1991 to May 1996, Mr. Sparkman  served as Vice President and Director,  later as
President  and  Director,  of  Diamond S Safety  Services,  Inc.,  a seller  and
servicer of hydrogen sulfide monitoring  equipment.  Mr. Sparkman received a BBA
degree from Texas A&M University

         All of the officers devote  substantially  all of their working time to
our business.

Section 16(A) Beneficial Ownership Reporting Compliance

         Section  16(a) of the  Securities  Exchange  Act of 1934  requires  our
officers and  directors  and persons who  beneficially  own more than 10% of our
outstanding  common  stock to file  reports  of  beneficial  ownership  with the
Securities and Exchange Commission and to furnish us with copies of the reports.

         Based solely on a review of the Forms 3, 4 and 5 and amendments thereto
furnished  to us for 2003 no persons  who were  either one of our  directors  or
officers or who  beneficially  owned more than 10% of our common stock failed to
file on a timely  basis  reports  required  by Section  16(a) of the  Securities
Exchange Act of 1934 except:

         o        Ronald D. Bingham was late in filing his Form 3;

         o        S. Craig Rogers was late in filing his Form 3;

         o        Charles  G.  Curtis  was late in filing a Form 4 to report two
                  acquisitions  of  warrants,  was  late in  filing  a Form 4 to
                  report the grant of a nonqualified option to him which Charles
                  G. Curtis reported on a Form 5 and filed amendments to Forms 4
                  he previously filed;

         o        William F.  Hughes,  Jr. was late in filing a Form 4 to report
                  the grant of a  nonqualified  option to him which  William  F.
                  Hughes reported on a Form 5;

         o        Wallace O.  Sellers  was late in filing a Form 4 to report two
                  transactions  and was late in  filing a Form 4 to  report  the
                  grant of a nonqualified option to him which Wallace O. Sellers
                  reported on a Form 5;

         o        Gene A.  Strasheim  was late in filing a Form 4 to report  the
                  grant of a nonqualified  option to him which Gene A. Strasheim
                  reported on a Form 5; and

         o        Richard  L.  Yadon  was late in  filing a Form 4 to repot  the
                  grant of a  nonqualified  option to him which Richard L. Yadon
                  reported on a Form 5.



                                       36


Code of Ethics

         Our Board of  Directors  has  adopted a Code of  Business  Conduct  and
Ethics  ("Code"),   which  we  intend  to  post  on  our  web  site  located  at
WWW.NGSGI.COM.  You may also obtain a copy of our Code by  requesting  a copy in
writing at 2911 SCR 1260, Midland, TX 79706 or by calling us at (432) 563-3974.

         Our Code  provides  general  statements of our  expectations  regarding
ethical standards that we expect our directors, officers and employees to adhere
to while acting on our behalf. Among other things, the Code provides that:

         o        We will comply with all laws, rules and regulations;

         o        Our directors,  officers and employees are to avoid  conflicts
                  of  interest  and are  prohibited  from  competing  with us or
                  personally exploiting our corporate opportunities;

         o        Our  directors,  officers  and  employees  are to protect  our
                  assets and maintain our confidentiality;

         o        We are  committed  to promoting  values of integrity  and fair
                  dealing; and

         o        We are  committed to  accurately  maintaining  our  accounting
                  records under  generally  accepted  accounting  principles and
                  timely filing our periodic reports.

         Our  Code  also  contains  procedures  for  our  employees  to  report,
anonymously or otherwise, violations of the Code.

ITEM 10. EXECUTIVE COMPENSATION

Executive Compensation

         The following table sets forth  information  regarding the compensation
paid during the years ended  December 31, 2003,  2002 and 2001 by us to Wayne L.
Vinson,  Earl R. Wait and Craig Rogers our only officers whose  combined  salary
and bonuses exceeded $100,000 during the year ended December 31, 2003.



                                                                                  Long-Term
                                            Annual Compensation              Compensation Awards
                                            -------------------              --------------------
Name
                                                                            Securities Underlying
Principal Position                   Year         Salary           Bonus          Options
------------------                   ----         ------           -----    -----------------------
                                                                 
Wayne L. Vinson                      2003      $ 120,000(1)      $ 48,000               -0-
     Executive Vice President        2002      $ 120,000(1)      $ 39,452               -0-(2)
     until 7/25/01                   2001      $ 102,692(1)      $ 25,583               -0-
     President from7/25/01 until
     3/15/04

Earl R. Wait                         2003      $   90,000        $ 41,256               -0-
     Chief Financial Officer         2002      $   90,000        $ 29,589             15,000
                                     2001      $   85,385        $ 23,164               -0-





                                       37


S. Craig Rogers                      2003      $   88,500        $ 37,669               -0-
     Vice President                  2002      $   80,000        $ 26,301              12,000
     Since June 2003                 2001      $   64,615        $ 20,957               -0-

--------------------------
(1)      Does not include any  compensation  paid to the wife of Wayne L. Vinson
         for her  services as our accounts  payable and payroll  clerk for 2003,
         2002 and 2001, respectively.

(2)      CAV-RDV,  Ltd.,  a Texas  limited  partnership  for the  benefit of the
         children of Wayne L. Vinson, was issued a five year warrant to purchase
         15,756  shares of our common stock at $2.50 per share in  consideration
         for CAV-RDV,  Ltd. guaranteeing a portion of our debt. The children are
         eighteen  years  old or  older  and Mr.  Vinson  was not a  partner  in
         CAV-RDV, Ltd. and disclaimed beneficial ownership of the warrants.

         We have  established a bonus  program for our  officers.  At the end of
each of our fiscal years, our Board of Directors  reviews our operating  history
and determines whether or not any bonuses should be paid to our officers. If so,
the Board of Directors  determines  what amount  should be paid to our officers.
The Board of Directors may discontinue the bonus program at any time.

                        Option Grants in Last Fiscal Year

         We did not grant any  options  to Wayne L.  Vinson,  Earl R. Wait or S.
Craig Rogers,  our officers whose combined salary and bonuses exceeded  $100,000
during our year ended December 31, 2003.

Aggregate Option Exercises in Last Fiscal Year and Fiscal Year End Option Values

         The  following  table  sets  forth  information  pertaining  to  option
exercises  by, and fiscal year end option  values of options  held by,  Wayne L.
Vinson,  Earl R. Wait, and S. Craig Rogers,  our only  executive  officers whose
combined salary and bonuses exceeded $100,000 during the year ended December 31,
2003:




                                                                                Fiscal Year End Option Values
                                                      Number of Securities           Value of Unexercised
                        Shares                       Underlying Unexercised          In-the-Money Options
                       Acquired         Value      Options at Fiscal Year End         at Fiscal Year End
Name                 On Exercise      Received      Exercisable/Unexercisable     Exercisable/Unexercisable
----                 -----------      --------     ---------------------------  -----------------------------
                                                                    
Wayne L. Vinson                0             0                             0/0                            0/0

Earl R. Wait                   0             0                   10,000/15,000                $23,000/$34,500

S. Craig Rogers                0             0                    8,000/12,000                $18,400/$27,600





                                       38


Compensation of Directors

         Our  directors who are not employees are paid $1,000 per quarter and at
December 31 of each year are issued a five year option to purchase  2,500 shares
of our common stock at the then market  value.  On December 31, 2003, we granted
an option to each of our five non-employee directors to purchase 2,500 shares of
our  common  stock at $5.55 per  share.  We also  reimburse  our  directors  for
accountable expenses incurred on our behalf.

1998 Stock Option Plan

         We have  adopted the 1998 Stock  Option  Plan,  which  provides for the
issuance of options to purchase up to 150,000  shares of our common  stock.  The
purpose of the plan is to attract and retain the best  available  personnel  for
positions of substantial  responsibility and to provide additional  incentive to
employees and consultants  and to promote the success of our business.  The plan
is administered by the Board of Directors or a compensation committee consisting
of two or more  non-employee  directors,  if appointed.  At its discretion,  the
administrator  of the plan may  determine  the  persons to whom  options  may be
granted and the terms upon which such options will be granted. In addition,  the
administrator  of the plan may  interpret  the plan  and may  adopt,  amend  and
rescind rules and regulations for its  administration.  The following options to
purchase our common stock have been granted under the plan and are outstanding:

         o        12,000 shares at an exercise price of $2.00 per share,

         o        33,000 shares at an exercise price of $3.25 per share,

         o        7,500 shares at an exercise price of $3.88 per share, and

         o        18,500 shares at an exercise price of $5.55 per share.

Limitations on Directors' and Officers' Liability

         Our Articles of  Incorporation  provide our officers and directors with
certain  limitations on liability to us or any of our  shareholders  for damages
for breach of fiduciary duty as a director or officer  involving certain acts or
omissions of any such director or officer.

         This  limitation  on  liability  may have the  effect of  reducing  the
likelihood  of  derivative  litigation  against  directors  and officers and may
discourage or deter  shareholders  or management from bringing a lawsuit against
directors  and  officers  for breach of their duty of care even  though  such an
action, if successful, might otherwise have benefited our shareholders and us.

         Our   Articles   of   Incorporation    and   bylaws   provide   certain
indemnification  privileges  to our  directors,  employees,  agents and officers
against  liabilities  incurred  in  legal  proceedings.   Also,  our  directors,
employees, agents or officers who are successful, on the merits or otherwise, in



                                       39


defense  of any  proceeding  to  which he or she was a party,  are  entitled  to
receive indemnification against expenses, including attorneys' fees, incurred in
connection with the proceeding.

         Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to our directors, officers and controlling persons pursuant
to the  foregoing  provisions,  or  otherwise,  we have been advised that in the
opinion of the  Securities  and  Exchange  Commission  such  indemnification  is
against  public  policy as expressed in the  Securities  Act and is,  therefore,
unenforceable.

         We are not aware of any pending litigation or proceeding  involving any
of our directors,  officers,  employees or agents as to which indemnification is
being or may be sought,  and we are not aware of any other pending or threatened
litigation  that  may  result  in  claims  for  indemnification  by  any  of our
directors, officers, employees or agents.

ITEM 11.  SECURITY  OWNERSHIP OF CERTAIN  BENEFICIAL  OWNERS AND  MANAGEMENT AND
RELATED STOCKHOLDER MATTERS

         The following  table sets forth,  as of March 18, 2004,  the beneficial
ownership of our common stock and our 10% convertible  series  preferred  stock:
(i)  by  each  of our  directors  and  executive  officers;  (ii)  by all of our
executive  officers and directors as a group;  and (iii) by all persons known by
us to  beneficially  own  more  than  five  percent  of  our  common  stock  and
benefically own more than five percent of our 10% convertible  series  preferred
stock.




                                                                          Shares of
                                       Shares of                      Convertible Series
                                     Common Stock       Percent       A Preferred Stock        Percent
                                     Beneficially     Beneficially       Beneficially        Beneficially
Name and Address                        Owned            Owned             Owned                Owned
----------------                     ------------     ------------    ------------------     ------------
                                                                                 
Wallace O. and Naudain Sellers        700,659(1)           14%               -0-                 -0-
P.O. Box 106
6539 Upper York Road
Solebury, PA  18963-0106

Charles G. Curtis                      68,000(2)          1.3%             18,000                5.2%
1 Penrose Lane
Colorado Springs, CO  80906

William F. Hughes                     244,500(3)          4.8%             12,000                3.5%
42921 Normandy Lane
Lancaster, CA 93536

Wallace C. Sparkman                   167,691(4)          3.3%               -0-                  -0-
4906 Oakwood Court
Midland, TX 79707




                                       40


Gene A. Strasheim                       2,500             .05%               -0-                  -0-
165 Huntington Place
Colorado Springs, CO  80906

Richard L. Yadon                      296,683(5)          5.9%               -0-                  -0-
P.O. Box 8715
Midland, TX  79708-8715

S. Craig Rogers                        14,250 (6)          .3%               -0-                  -0-
14732 Bluestem Ave
Gardendale, TX  79758

Earl R. Wait                           75,000(7)          1.5%               -0-                  -0-
109 Seco
Portland, TX  78374

Scott W. Sparkman                     516,467(8)         10.2%               -0-                  -0-
1604 Ventura Avenue
Midland, TX  79705

All directors and executive         2,085,750 (9)        39.5%             30,000                8.7%
officers as a group
(nine persons)

CAV-RDV, Ltd.                         488,128(10)         9.7%               -0-                  -0-
1541 Shannon Drive
Lewisville, TX  75077

RWG Investments LLC                   424,000(11)         8.3%             12,000                3.5%
5980 Wildwood Drive
Rapid City, SD  57902

----------------------------------
     (1)  Includes  238,720 shares of common stock owned by the Wallace Sellers,
          July 11,  2002 GRAT,  warrants  to  purchase  21,936  shares of common
          stock,  9,032  shares of common stock and 5,000 shares of common stock
          at $ 2.50 per  share,  at $3.25  per  share  and at $6.25  per  share,
          respectively,  owned by Wallace  Sellers,  options to  purchase  2,500
          shares of common  stock at $3.88 per share and 2,500  shares of common
          stock at $5.55 per  share,  respectively,  owned by  Wallace  Sellers,
          95,971  shares of common stock owned by Naudain  Sellers,  and 238,720
          shares of common  stock  owned by the Naudain  Sellers,  July 11, 2002
          GRAT.  Wallace  and Naudain  Sellers  are  husband  and wife.  Wallace
          Sellers is the trustee of his wife's trust and his wife is the trustee
          of his trust.  The  beneficiaries  of the trusts are two  trusts.  The
          beneficiaries  of one  trust  are  Naudain  Sellers  and  their  three
          children  and the  beneficiaries  of the other  trust are their  three
          children.
     (2)  Represents warrants to purchase 40,000 shares of common stock at $3.25
          per share,  options to purchase  2,500 shares of common stock at $3.88
          per  share  and 2,500  shares  of  common  stock at $5.55  per  share,
          respectively,  and 18,000 shares of common stock which may be obtained
          upon  conversion of shares of our 10%  Convertible  Series A Preferred
          Stock.
     (3)  Includes  168,500  shares of common  stock  owned by the  William  and
          Cheryl  Hughes Family  Trust,  a warrant to purchase  60,000 shares of
          common stock at $3.25 per share, on option to purchase 2,500 shares of
          common  stock at $5.55  per share and  12,000  shares of common  stock
          which may be obtained upon conversion of shares of our 10% Convertible
          Series A Preferred Stock.
     (4)  Includes  105,691 shares owned by Diamente  Investments,  LLP, a Texas
          limited  partnership  of which Mr.  Sparkman  is a general and limited
          partner.
     (5)  Includes  warrants to purchase  14,683 shares of common stock at $2.50
          per share and an option to purchase  2,500  shares if common  stock at
          $5.55 per share.



                                       41


     (6)  Includes  warrants to purchase  1,125  shares of common stock at $6.25
          per share and an option to purchase  12,000  shares of common stock at
          $3.25 per share that began to vest in April 2003.
     (7)  Includes an option to purchase  15,000 shares of common stock at $3.25
          per share that began to vest in April 2003.
     (8)  Includes  20,000 shares of common stock owned by Scott W. Sparkman and
          475,000 shares of common stock and warrants to purchase  21,467 shares
          of common stock at $2.50 per share owned by Diamond S DGT, a trust for
          which Mr. Sparkman is a co-trustee and co-beneficiary with his sister.
     (9)  Includes  the  shares of common  stock set forth in (1)  through  (10)
          above  issuable  upon the  exercise  of options and  warrants  and the
          conversion of shares of our 10% Convertible Series A Preferred Stock.
     (10) Includes  warrants to purchase  15,756 shares of common stock at $2.50
          per  share,  and  2,122  shares of  common  stock at $3.25 per  share,
          respectively.  CAV-RDV is a Texas Limited  Partnership for the benefit
          of Ryan and Candice Vinson.
     (10) Includes  warrants to purchase  32,000 shares of common stock at $3.25
          per share, warrants to purchase 15,000 shares of common stock at $6.25
          per share and 12,000 shares of common stock which may be obtained upon
          conversion of shares of our 10% Convertible  Series A Preferred Stock.
          RWG  Investments  LLC is a limited  liability  company the  beneficial
          owner of which is Roland W. Gentner,  5980 Wildwood Drive, Rapid City,
          South Dakota 57902.

ITEM 12. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

         In April 2002, we issued five year  warrants to purchase  shares of our
common stock at $3.25 per share to the following  persons for  guaranteeing  our
restructured bank debt indicated:

                               Number of Shares            Amount of Additional
     Name                     Underlying Warrants            Debt Guaranteed
     ----                     -------------------            ---------------

     Wallace O. Sellers              9,032                  $  451,601
     CAV-RDV, Ltd.(1)                2,122                     106,098
     Richard L. Yadon                5,318                     265,879

(1)      CAV-RDV,  Ltd., is a Texas limited  partnership  for the benefit of the
         children of Wayne L. Vinson.  Both  children are eighteen  years old or
         older and Mr.  Vinson is not a partner  in  CAV-RDV,  Ltd.  Mr.  Vinson
         disclaims beneficial ownership of the warrants.

         None of the guaranties is still in effect.

         Wayne L.  Vinson,  Earl R.  Wait and  Wallace  C.  Sparkman  have  also
guaranteed  approximately  $197,000,  $84,000  and  $92,000,   respectively,  of
additional  debt for us without  consideration.  This debt was incurred  when we
acquired  vehicles,  equipment and software.  The  following  schedule  provides
information as to the remaining debt balances as of February 29, 2004:

                                  Balance at           Interest         Maturity
         Guarantor             February 29, 2004           Rate             Date
         ---------             -----------------      ---------      -----------
         Earl Wait                        $1,162          1.90%        3/26/2004
         Earl Wait                        26,594         10.50%       10/10/2005
         Wallace Sparkman                 69,908            10%       10/15/2010
         Wayne Vinson                      1,008          1.90%        4/22/2004
         Wayne Vinson                      2,660          7.50%        6/21/2004

         None of the guarantees is still in effect.



                                       42


         In October,  1999, RWG Investments,  LLC was granted a five year option
to  purchase  100,000  shares  of  our  common  stock  at  $2.00  per  share  in
consideration  of one of its members  serving as an advisor to us. In June 2003,
RWG Investments LLC exercised the option.

         Hunter Wise  Financial  Group LLC served as our  investment  banker and
advisor in connection with our acquisition of the compression  related assets of
Dominion  Michigan for which we paid Hunter Wise a total fee of $440,000.  James
T. Grigsby, one of our former directors, has a 1% interest in Hunter Wise.

         All of our  independent  directors  were each paid $1,000 and were each
issued an option to purchase 2,500 shares of our common stock at $5.55 per share
for  serving as our  directors  during the year ended  December  31, 2003 and at
$3.88 for serving as our directors during the year ended December 31, 2002.

ITEM 13. EXHIBITS AND REPORTS ON FORM 8-K


         The  following  is a list of all  exhibits  filed as part of this  Form
10-KSB:

Exhibit No.        Description and Method of Filing
-----------        --------------------------------

2.1                Purchase and Sale Agreement by and between Hy-Bon Engineering
                   Company, Inc. and NGE Leasing, Inc.(2)

3.1                Articles of incorporation.(3)

3.2                Amendment to articles of incorporation  dated March 31, 1999,
                   and filed on May 25, 1999.(3)

3.3                Amendment to articles of  incorporation  dated July 25, 2001,
                   and filed on July 30, 2001.(3)

3.4                Amendment to articles of  incorporation  dated June 18, 2003,
                   and filed on June 19, 2003.(3)

3.5                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004  merging NGE  Leasing,  Inc into  Natural Gas
                   Services Group, Inc.(1)

3.6                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004 merging Rotary Gas Systems, Inc. into Natural
                   Gas Services Group, Inc.(1)

3.7                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004 merging  Great Lakes  Compression,  Inc. into
                   Natural Gas Services Group, Inc.(1)

3.8                Bylaws.(3)

4.1                Form of warrant certificate.(3)

4.2                Form of warrant agent agreement.(3)




                                       43


Exhibit No.        Description and Method of Filing
-----------        --------------------------------

4.3                Form of lock-up agreement.(3)

4.4                Form of  representative's  option for the  purchase of common
                   stock.(3)

4.5                Form  of   representative's   option  for  the   purchase  of
                   warrants.(3)

10.1               1998 Stock Option Plan.(3)

10.2               Asset  Purchase  Agreement  between  Natural Gas  Acquisition
                   Corporation and Great Lakes  Compression,  Inc. dated January
                   1, 2001.(3)

10.3               Amendment to Guaranty  Agreement between Natural Gas Services
                   Group,  Inc.  and  Dominion  Michigan  Production   Services,
                   Inc.(3)

10.4               Form of  Series A 10%  Subordinated  Notes due  December  31,
                   2006.(3)

10.5               Form of Five-Year Warrants to Purchase Common Stock.(3)

10.6               Warrants issued to Berry-Shino Securities, Inc.(3)

10.7               Warrants issued to Neidiger, Tucker, Bruner, Inc.(3)

10.8               Form  of  warrant  issued  in  March  2001  for  guaranteeing
                   debt.(3)

10.9               Form  of  warrant  issued  in  April  2002  for  guaranteeing
                   debt.(3)

10.10              Exhibits  3(c)(1),  3(c)(2),   3(c)(3),  3(1)(4),   13(d)(1),
                   13(d)(2) and  13(d)(3) to Asset  Purchase  Agreement  between
                   Natural   Gas   Acquisition   Corporation   and  Great  Lakes
                   Compression, Inc. dated January 1, 2001.(3)

10.11              Articles of Organization of Hy-Bon Rotary Compression, L.L.C.
                   dated April 17, 2000 and filed on April 20, 2001.(3)

10.12              Regulations of Hy-Bon Rotary Compression, L.L.C.(3)


10.13              First Amended and Restated Loan Agreement between Natural Gas
                   Services Group, Inc. and Western National Bank(4)

10.14              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Alan Kurus(5)

10.15              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Wayne Vinson(5)

10.16              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Earl R. Wait(5)

10.17              Lease Agreement dated June 1, 2003 with Steven J. & Katherina
                   L. Winer(1)

10.18              Lease  Agreement  dated  June 19,  2003 with Wise  Commercial
                   Properties(1)

23.1               Consent of HEIN + ASSOCIATES LLP.(1)

31.1               Certification of Chief Executive  Officer required by Section
                   302 of the Sarbanes-Oxley Act of 2002. (1)



                                       44


Exhibit No.        Description and Method of Filing
-----------        --------------------------------

31.2               Certification of Chief Financial  Officer required by Section
                   302 of the Sarbanes-Oxley Act of 2002. (1)

32.1               Certification  required by Section 906 of the  Sarbanes-Oxley
                   Act of 2002. (1)

32.2               Certification  required by Section 906 of the  Sarbanes-Oxley
                   Act of 2002. (1)
-------------------
    (1) Filed herewith.
    (2) Exhibit  2.1 is  incorporated  by  reference  to Exhibit 2.1 filed as an
        exhibit to our Current Report on Form 8-K dated February 28, 2003
    (3) Exhibits  3.1  through  3.4 and 3.8 through  10.12 are  incorporated  by
        reference  to  the  exhibits  filed  as  exhibits  to  our  Registration
        Statement No. 333-88314
    (4) Exhibit 10.13 is incorporated by reference to our Current Report on Form
        8-K filed on April 14, 2003
    (5) Exhibits  10.14,  10.15 and  10.16  are  incorporated  by  reference  to
        exhibits 10.25,  10.26 and 10.27 to our Annual Report on Form 10-KSB for
        the year ended December 31, 2002

(b)      Reports on Form 8-K

         On November 11, 2003, we filed a Current Report on Form 8-K in which we
described  our earnings  release for the third quarter of 2003 under Item 12 and
filed a copy of the release as an exhibit under Item 7.























                                       45


ITEM 14.  PRINCIPAL ACCOUNTANT FEES AND SERVICES

         Our principal  accountant  for the fiscal years ended December 31, 2003
and 2002 was HEIN + ASSOCIATES LLP.

Audit Fees

         The aggregate fees billed for professional  services rendered by HEIN +
ASSOCIATES  LLP for the audit of our  financial  statements  for our fiscal year
ended  December 31, 2003 and 2002 and the review of the financial  statements in
our Forms  10-QSB for the fiscal  quarters in such fiscal years were $75,749 and
$43,691, respectively.

Audit Related Fees

         No fees were billed by HEIN +  ASSOCIATES  LLP during our fiscal  years
ended December 31, 2003 and 2002 for assurance and related services.

Tax Fees

         The aggregate fees billed for professional  services rendered by HEIN +
ASSOCIATES LLP for the compliance,  tax advice and tax planning were $18,391 and
$15,468 respectively.

Audit Committees Pre-Approval Policies and Procedures

         In  accordance  with  Section  10A(i) of the  Exchange  Act,  our audit
committee  approves the  engagement  of our  principal  accountant  prior to the
accountant rendering audit or non-audit services.

























                                       46


SIGNATURES


         In  accordance  with  Section  13 or 15(d)  of the  Exchange  Act,  the
registrant  caused  this  report to be signed on its behalf by the  undersigned,
thereunto duly authorized.


Date:  March 25, 2004               NATURAL GAS SERVICES GROUP, INC.


                                    /s/ Wallace C. Sparkman
                                    -----------------------
                                    Wallace C. Sparkman, President and Principal
                                    Executive Officer

         In accordance  with the Exchange Act, this report has been signed below
by the following  persons on behalf of the  registrant and in the capacities and
on the dates indicated:



Signature                                    Title                    Date
---------                                    -----                    ----

/s/Charles G. Curtis                        Director              March 25, 2004
----------------------------
Charles G. Curtis

/s/William F. Hughes, Jr                    Director              March 25, 2004
----------------------------
William F. Hughes, Jr.

/s/Wallace O. Sellers                       Director              March 25, 2004
----------------------------
Wallace O. Sellers

/s/Wallace C. Sparkman                      Director              March 25, 2004
----------------------------
Wallace C. Sparkman

/s/ Gene A. Strasheim                       Director              March 25, 2004
----------------------------
Gene A. Strasheim

/s/Richard L. Yadon                         Director              March 25, 2004
----------------------------
Richard L. Yadon











                                       47


                                INDEX OF EXHIBITS

         The  following  is a list of all  exhibits  filed as part of this  Form
10-KSB:

Exhibit No.        Description and Method of Filing
-----------        --------------------------------

2.1                Purchase and Sale Agreement by and between Hy-Bon Engineering
                   Company, Inc. and NGE Leasing, Inc.(2)

3.1                Articles of incorporation.(3)

3.2                Amendment to articles of incorporation  dated March 31, 1999,
                   and filed on May 25, 1999.(3)

3.3                Amendment to articles of  incorporation  dated July 25, 2001,
                   and filed on July 30, 2001.(3)

3.4                Amendment to articles of  incorporation  dated June 18, 2003,
                   and filed on June 19, 2003.(3)

3.5                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004  merging NGE  Leasing,  Inc into  Natural Gas
                   Services Group, Inc.(1)

3.6                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004 merging Rotary Gas Systems, Inc. into Natural
                   Gas Services Group, Inc.(1)

3.7                Articles of Merger filed on December 30, 2003 to be effective
                   January 1, 2004 merging  Great Lakes  Compression,  Inc. into
                   Natural Gas Services Group, Inc.(1)

3.8                Bylaws.(3)

4.1                Form of warrant certificate.(3)

4.2                Form of warrant agent agreement.(3)

4.3                Form of lock-up agreement.(3)

4.4                Form of  representative's  option for the  purchase of common
                   stock.(3)

4.5                Form  of   representative's   option  for  the   purchase  of
                   warrants.(3)

10.1               1998 Stock Option Plan.(3)

10.2               Asset  Purchase  Agreement  between  Natural Gas  Acquisition
                   Corporation and Great Lakes  Compression,  Inc. dated January
                   1, 2001.(3)

10.3               Amendment to Guaranty  Agreement between Natural Gas Services
                   Group,  Inc.  and  Dominion  Michigan  Production   Services,
                   Inc.(3)

10.4               Form of  Series A 10%  Subordinated  Notes due  December  31,
                   2006.(3)

10.5               Form of Five-Year Warrants to Purchase Common Stock.(3)

10.6               Warrants issued to Berry-Shino Securities, Inc.(3)

10.7               Warrants issued to Neidiger, Tucker, Bruner, Inc.(3)



                                       48


Exhibit No.        Description and Method of Filing
-----------        --------------------------------

10.8               Form  of  warrant  issued  in  March  2001  for  guaranteeing
                   debt.(3)

10.9               Form  of  warrant  issued  in  April  2002  for  guaranteeing
                   debt.(3)

10.10              Exhibits  3(c)(1),  3(c)(2),   3(c)(3),  3(1)(4),   13(d)(1),
                   13(d)(2) and  13(d)(3) to Asset  Purchase  Agreement  between
                   Natural   Gas   Acquisition   Corporation   and  Great  Lakes
                   Compression, Inc. dated January 1, 2001.(3)

10.11              Articles of Organization of Hy-Bon Rotary Compression, L.L.C.
                   dated April 17, 2000 and filed on April 20, 2001.(3)

10.12              Regulations of Hy-Bon Rotary Compression, L.L.C.(3)


10.13              First Amended and Restated Loan Agreement between Natural Gas
                   Services Group, Inc. and Western National Bank(4)

10.14              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Alan Kurus(5)

10.15              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Wayne Vinson(5)

10.16              Termination of Employment  Agreement  Letter  relating to the
                   Employment Agreement of Earl R. Wait(5)

10.17              Lease Agreement dated June 1, 2003 with Steven J. & Katherina
                   L. Winer(1)

10.18              Lease  Agreement  dated  June 19,  2003 with Wise  Commercial
                   Properties(1)

23.1               Consent of HEIN + ASSOCIATES LLP.(1)

31.1               Certification of Chief Executive  Officer required by Section
                   302 of the Sarbanes-Oxley Act of 2002. (1)

31.2               Certification of Chief Financial  Officer required by Section
                   302 of the Sarbanes-Oxley Act of 2002. (1)

32.1               Certification  required by Section 906 of the  Sarbanes-Oxley
                   Act of 2002. (1)

32.2               Certification  required by Section 906 of the  Sarbanes-Oxley
                   Act of 2002. (1)






                                       49


    (1) Filed herewith.
    (2) Exhibit  2.1 is  incorporated  by  reference  to Exhibit 2.1 filed as an
        exhibit to our Current Report on Form 8-K dated February 28, 2003
    (3) Exhibits  3.1  through  3.4 and 3.8 through  10.12 are  incorporated  by
        reference  to  the  exhibits  filed  as  exhibits  to  our  Registration
        Statement No. 333-88314
    (4) Exhibit 10.13 is incorporated by reference to our Current Report on Form
        8-K filed on April 14, 2003
    (5) Exhibits  10.14,  10.15 and  10.16  are  incorporated  by  reference  to
        exhibits 10.25,  10.26 and 10.27 to our Annual Report on Form 10-KSB for
        the year ended December 31, 2002





























                                       50


                          INDEPENDENT AUDITOR'S REPORT




The Board of Directors
Natural Gas Services Group, Inc.


We have  audited  the  accompanying  consolidated  balance  sheet of Natural Gas
Services Group,  Inc. and Subsidiaries  (the "Company") as of December 31, 2003,
and the related consolidated statements of income, stockholders' equity and cash
flows for the years ended December 31, 2003 and 2002. These financial statements
are the  responsibility of the Company's  management.  Our  responsibility is to
express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with auditing standards generally accepted
in the  United  States of  America.  Those  standards  require  that we plan and
perform the audits to obtain  reasonable  assurance  about whether the financial
statements are free of material misstatement.  An audit includes examining, on a
test basis,  evidence  supporting  the amounts and  disclosures in the financial
statements.  An audit also includes assessing the accounting principles used and
significant  estimates  made by  management  as well as  evaluating  the overall
financial  statement  presentation.   We  believe  that  our  audits  provide  a
reasonable basis for our opinion.

In our opinion, the consolidated  financial statements referred to above present
fairly, in all material  respects,  the financial  position of the Company as of
December 31, 2003,  and the results of its operations and its cash flows for the
years ended December 31, 2003 and 2002 in conformity with accounting  principles
generally accepted in the United States of America.




HEIN & ASSOCIATES LLP

Dallas, Texas
February 13, 2004








                                      F-1




                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEET

                                DECEMBER 31, 2003

                                     ASSETS
                                     ------
                                                                                
CURRENT ASSETS:
   Cash and cash equivalents                                                       $   176,202
   Trade accounts receivable, net of doubtful accounts of $5,000                       816,596
   Inventory                                                                         2,554,239
   Prepaid expenses and other                                                          107,030
                                                                                   -----------
                  Total current assets                                               3,654,067

LEASE EQUIPMENT, net of accumulated depreciation of $2,978,848                      18,986,190
PROPERTY AND EQUIPMENT, net of accumulated depreciation of $906,736                  2,818,438
GOODWILL, net of accumulated amortization of $325,192                                2,589,655
PATENTS, net of accumulated amortization of $137,423                                   113,941
OTHER ASSETS                                                                           107,900
                                                                                   -----------
                  Total assets                                                     $28,270,191
                                                                                   ===========

                      LIABILITIES AND STOCKHOLDERS' EQUITY
                      ------------------------------------

CURRENT LIABILITIES:
   Current portion of long-term debt and capital lease                             $ 2,363,927
   Line of credit                                                                      300,000
   Accounts payable and accrued liabilities                                          1,070,652
   Deferred income                                                                     207,215
                                                                                   -----------
                  Total current liabilities                                          3,941,794

LONG-TERM DEBT AND CAPITAL LEASE, less current portion                               6,650,486
SUBORDINATED NOTES, net of discount of $129,918                                      1,409,343
DEFERRED TAX LIABILITY                                                               1,843,406
COMMITMENT (Note 11)
STOCKHOLDERS' EQUITY:
   Preferred stock, 5,000,000 shares authorized, par value $0.01:
     10 % Convertible Series A: 381,654 shares authorized, 343,654 shares
       outstanding;10% cumulative, liquidation preference of $1,116,876                  3,437
   Common stock, 30,000,000 shares authorized, par value $0.01; 5,031,181 shares
     issued and outstanding                                                             50,311
   Additional paid-in capital                                                       11,205,375
   Retained earnings                                                                 3,166,039
                                                                                   -----------
                  Total stockholders' equity                                        14,425,162
                                                                                   -----------
                  Total liabilities and stockholders' equity                       $28,270,191
                                                                                   ===========





       See accompanying notes to these consolidated financial statements.

                                       F-2



                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                        CONSOLIDATED STATEMENTS OF INCOME

                                                        FOR THE YEARS ENDED
                                                            DECEMBER 31,
                                                   ----------------------------
                                                           2003            2002
                                                   ------------    ------------
REVENUE:
   Sales, net                                      $  3,865,045    $  4,335,721
   Service and maintenance income                     1,773,256       1,562,650
   Leasing income and interest                        7,111,221       4,398,170
                                                   ------------    ------------
                  Total revenue                      12,749,522      10,296,541

COSTS OF REVENUE:
   Cost of sales                                      2,859,572       3,078,429
   Cost of service                                    1,243,499       1,326,572
   Cost of leasing                                    1,953,525       1,166,530
                                                   ------------    ------------
                  Total costs of revenue              6,056,596       5,571,531
                                                   ------------    ------------

GROSS PROFIT                                          6,692,926       4,725,010

OPERATING EXPENSES:
   Selling expenses                                     678,777         499,721
   General and administrative                         1,613,076       1,218,513
   Depreciation and amortization                      1,725,717       1,166,004
                                                   ------------    ------------
                  Total operating expenses            4,017,570       2,884,238
                                                   ------------    ------------

INCOME FROM OPERATIONS                                2,675,356       1,840,772

OTHER INCOME (EXPENSE):
   Interest expense                                    (667,122)       (975,719)
   Equity in earnings of joint venture                     --           485,109
   Other income (expense)                                (4,302)         19,386
                                                   ------------    ------------
                  Total other income (expense)         (671,424)       (471,224)
                                                   ------------    ------------

INCOME BEFORE PROVISION FOR INCOME TAXES              2,003,932       1,369,548

PROVISION FOR INCOME TAXES:
   Current                                               25,000          25,900
   Deferred                                             671,799         557,563
                                                   ------------    ------------
                  Total income tax expense              696,799         583,463
                                                   ------------    ------------

NET INCOME                                            1,307,133         786,085

PREFERRED DIVIDENDS                                     120,941         106,624
                                                   ------------    ------------

NET INCOME AVAILABLE TO COMMON STOCKHOLDERS        $  1,186,192    $    679,461
                                                   ============    ============

NET INCOME PER COMMON SHARE:
Basic                                              $       0.24    $       0.19
                                                   ============    ============
Diluted                                            $       0.23    $       0.16
                                                   ============    ============
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic                                                 4,946,922       3,649,413
Diluted                                               5,252,531       4,305,053


       See accompanying notes to these consolidated financial statements.

                                      F-3




                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                 CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

                 FOR THE YEARS ENDED DECEMBER 31, 2003 AND 2002



                                                  PREFERRED STOCK                   COMMON STOCK
                                          ------------------------------    ------------------------------
                                              SHARES           AMOUNT           SHARES           AMOUNT
                                          -------------    -------------    -------------    -------------
                                                                                 
BALANCES, January 1, 2002                       377,154    $       3,772        3,357,632    $      33,576

Issuance of preferred stock                       4,500               45             --               --

Issuance of common stock and warrants              --               --          1,500,000           15,000

Warrants issued for debt guaranty                  --               --               --               --

Repurchase of warrants                             --               --               --               --

Dividends on preferred stock                       --               --               --               --

Net income                                         --               --               --               --
                                          -------------    -------------    -------------    -------------

BALANCES, January 1, 2003                       381,654            3,817        4,857,632           48,576

Exercise of common stock options and
 warrants                                          --               --            135,549            1,355

Conversion of preferred stock to common
 stock                                          (38,000)            (380)          38,000              380

Dividends on preferred stock                       --               --               --               --

Net income                                         --               --               --               --
                                          -------------    -------------    -------------    -------------

BALANCES, December 31, 2003                     343,654    $       3,437        5,031,181    $      50,311
                                          =============    =============    =============    =============

                                            ADDITIONAL                          TOTAL
                                             PAID-IN          RETAINED      STOCKHOLDERS'
                                             CAPITAL          EARNINGS         EQUITY
                                          -------------    -------------    -------------

BALANCES, January 1, 2002                 $   4,442,816    $   1,300,386    $   5,780,550

Issuance of preferred stock                      12,722             --             12,767

Issuance of common stock and warrants         6,514,170             --          6,529,170

Warrants issued for debt guaranty                42,025             --             42,025

Repurchase of warrants                          (43,000)            --            (43,000)

Dividends on preferred stock                       --           (106,624)        (106,624)

Net income                                         --            786,085          786,085
                                          -------------    -------------    -------------

BALANCES, January 1, 2003                    10,968,733        1,979,847       13,000,973

Exercise of common stock options and
 warrants                                       236,642             --            237,997

Conversion of preferred stock to common
 stock                                             --               --               --

Dividends on preferred stock                       --           (120,941)        (120,941)

Net income                                         --          1,307,133        1,307,133
                                          -------------    -------------    -------------

BALANCES, December 31, 2003               $  11,205,375    $   3,166,039    $  14,425,162
                                          =============    =============    =============





       See accompanying notes to these consolidated financial statements.

                                      F-4






                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS

                                                                   FOR THE YEARS ENDED DECEMBER 31,
                                                                   --------------------------------
                                                                        2003              2002
                                                                   --------------    --------------
                                                                               
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net income                                                      $    1,307,133    $      786,085
   Adjustments to reconcile net income to net cash provided by
   operating activities:
     Depreciation and amortization                                      1,725,717         1,166,004
     Deferred taxes                                                       671,799           557,563
     Amortization of debt issuance costs                                   64,956            70,369
     Gain on disposal of assets                                            18,615           (15,066)
     Warrants issued for debt guarantee                                      --              42,025
     Equity in earnings of joint venture                                     --            (485,109)
     Changes in current assets:
         Trade and other receivables                                     (391,498)          276,588
         Inventory                                                     (1,078,445)          139,614
         Prepaid expenses and other                                        66,272           (11,888)
     Changes in current liabilities:
         Accounts payable and accrued liabilities                         542,790          (348,549)
         Deferred income                                                  173,678           134,187
     Other changes                                                        (76,597)         (105,870)
                                                                   --------------    --------------
                Net cash provided by operating activities               3,024,420         2,205,953

CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchase of property and equipment                                  (7,881,720)       (4,414,952)
   Proceeds from sale of property and equipment                           119,500            40,000
   Distribution from equity method investment                             107,774           405,466
   Decrease in lease receivable                                           210,512            84,908
                                                                   --------------    --------------
                Net cash used in investing activities                  (7,443,934)       (3,884,578)

CASH FLOWS FROM FINANCING ACTIVITIES:
   Net proceeds from lines of credit                                      300,000              --
   Proceeds from long-term debt                                         3,478,568         1,956,893
   Repayments of long-term debt                                        (2,013,546)       (4,463,612)
   Dividends on preferred stock                                          (120,941)         (106,624)
   Proceeds from sale of stock and exercise of stock options and
     warrants
                                                                          237,997         6,529,170
   Net proceeds from preferred stock sales                                   --              12,767
   Purchase of warrants from underwriter                                     --             (43,000)
                                                                   --------------    --------------
                Net cash provided by financing activities               1,882,078         3,885,594

         NET CHANGE IN CASH                                            (2,537,436)        2,206,969

CASH, beginning of year                                                 2,713,638           506,669
                                                                   --------------    --------------
CASH, end of year                                                  $      176,202    $    2,713,638
                                                                   ==============    ==============

SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
   Interest paid                                                   $      667,122    $      975,719
                                                                   ==============    ==============
   Income taxes paid                                               $       35,292    $        4,110
                                                                   ==============    ==============



       See accompanying notes to these consolidated financial statements.

                                      F-5


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


1.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
     ------------------------------------------

     Organization and Principles of Consolidation
     --------------------------------------------
     Natural Gas  Services  Group,  Inc.  (the  "Company" or "NGSG") (a Colorado
     corporation)  was formed on December 18, 1998 for the purposes of combining
     the operations of certain manufacturing, service and leasing entities.

     As of  December  31,  2003,  NGSG  conducted  its  operations  through  the
     following wholly-owned subsidiaries:

     o    Rotary Gas Systems,  Inc. ("RGS") (a Texas  corporation) is engaged in
          the manufacturing and distribution of natural gas compressor  packages
          for use in the  petroleum  industry  and natural gas flare  stacks and
          ignition systems for use in oilfield, refinery,  petrochemical plant ,
          and landfill applications in New Mexico, California and Texas.

     o    NGE Leasing,  Inc. ("NGE") (a Texas corporation) is engaged in leasing
          natural gas compressor  packages to entities in the petroleum industry
          and irrigation motor units to entities in the  agricultural  industry.
          NGE's leasing  income is  concentrated  in New Mexico,  California and
          Texas.

     o    Great Lakes Compression,  Inc.,  ("GLC") (a Colorado  corporation) was
          formed in March 2001 and acquired the assets and certain operations of
          a  business  that  fabricates,   leases,   and  services  natural  gas
          compressors  to  producers  of  oil  and  natural  gas,  primarily  in
          Michigan.

     Effective January 1, 2004, RGS, GLC and NGE were merged into NGSG.

     The accompanying  financial  statements present the consolidated results of
     the  Company  and  its  wholly-owned  subsidiaries.  Investments  in  joint
     ventures in which the Company  does not have  majority  voting  control are
     accounted  for  by  the  equity  method.  All  intercompany   balances  and
     transactions have been eliminated in consolidation.

     Cash Equivalents
     ----------------
     For purposes of reporting cash flows, the Company  considers all short-term
     investments  with an original  maturity of three  months or less to be cash
     equivalents.

     Accounts Receivable
     -------------------
     The Company's  trade  receivables  consist of customer  obligations for the
     sale of  compressors  and flare  systems due under  normal  trade terms and
     operating leases for the use of the Company's compressors.  The receivables
     are not  collateralized  except as  provided  for under  lease  agreements.
     However,  the Company requires  deposits of as much as 50% for large custom
     contracts.  The Company extends credit based on management's  assessment of
     the customer's financial condition, receivable aging, customer disputes and
     general business and economic conditions. Management believes the allowance
     for doubtful  accounts for trade receivables of $5,000 at December 31, 2003
     is adequate.



                                      F-6


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


     Inventory
     ---------
     Inventory is valued at the lower of cost or market. The cost of inventories
     in 2003 was determined by the weighted average method and previously by the
     first-in,  first-out method. The effect of changing the inventory method in
     2003 was not  material.  At December 31, 2003,  inventory  consisted of the
     following:

                    Raw materials          $1,969,930
                    Work in process           584,309
                                           ----------
                                           $2,554,239
                                           ==========

     Property and Equipment
     ----------------------
     Property and equipment are recorded at cost less  accumulated  depreciation
     and  amortization.  Depreciation  and  amortization  are computed using the
     straight-line  method over the estimated useful lives of the assets,  which
     range from five to thirty years.

     Gains and losses  resulting  from sales and  dispositions  of property  and
     equipment are included in current  operations.  Maintenance and repairs are
     charged to operations as incurred.

     Patents
     -------
     The  Company  has  patents  for a flare tip  ignition  device and flare tip
     burner  pilot.   The  costs  of  the  patents  are  being  amortized  on  a
     straight-line basis over nine years, the remaining life of the patents when
     acquired.  Amortization  expense for patents of $27,484 was  recognized for
     each of the years ended  December 31, 2003 and 2002.  Amortization  expense
     for each of the next four years is expected to be $27,484 per year.

     Goodwill
     --------
     Goodwill  represents  the cost in excess of fair value of the  identifiable
     net assets acquired in two acquisitions.  Goodwill was being amortized on a
     straight-line  basis over 20 years, but the Company ceased  amortization of
     goodwill  effective  January  1,  2002  in  accordance  with  Statement  of
     Financial Accounting Standards ("FAS") No. 142.

     FAS 142 requires that goodwill be tested for impairment at least  annually.
     The Company  completed  its most recent test for goodwill  impairment as of
     June 30, 2003, at which time no impairment was indicated.

     Long-Lived Assets
     -----------------
     The Company's policy is to periodically  review the net realizable value of
     its long-lived  assets,  other than goodwill,  through an assessment of the
     estimated  future  cash  flows  related to such  assets.  In the event that
     assets  are  found  to  be  carried  at  amounts  in  excess  of  estimated
     undiscounted  future  cash  flows,  then the assets  will be  adjusted  for
     impairment to a level  commensurate with a discounted cash flow analysis of
     the underlying  assets.  Based upon its most recent  analysis,  the Company
     believes no impairment of long-lived assets exists at December 31, 2003.

     Advertising Costs
     -----------------
     Advertising costs are expensed as incurred.  Total advertising  expense was
     $46,337 in 2003 and $49,720 in 2002.


                                      F-7


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


     Financial Instruments
     ---------------------
     Management  believes that  generally the fair value of the Company's  notes
     payable at December 31, 2003  approximate  their carrying values due to the
     short-term  nature  of the  instruments  or the  use of  prevailing  market
     interest rates.

     Revenue Recognition
     -------------------
     Revenue  from the sales of custom  and  fabricated  compressors,  and flare
     systems is recognized upon shipment of the equipment to customers. Exchange
     and rebuilt  compressor  revenue is  recognized  when both the  replacement
     compressor  has  been  delivered  and  the  rebuild   assessment  has  been
     completed.  Revenue from compressor service,  and retrofitting  services is
     recognized upon providing services to the customer.  Maintenance  agreement
     revenue is recognized as services are rendered. Rental and lease revenue is
     recognized over the terms of the respective lease agreements based upon the
     classification of the lease.  Deferred income represents  payments received
     before a product is shipped.

     Per Share Data
     --------------
     Basic  earnings  per common share is computed  using the  weighted  average
     number of common shares outstanding during the period. Diluted earnings per
     common share is computed  using the weighted  average  number of common and
     common stock equivalent shares outstanding during the period.  Common stock
     equivalent  shares are  excluded  from the  computation  if their effect is
     antidilutive. In 2003 and 2002, antidilutive shares related to common stock
     options and warrants and convertible  preferred stock totaled 2,156,154 and
     2,181,654, respectively.

     The  following  table  sets  forth the  computation  of basic  and  diluted
     earnings per share:

                                                         YEAR ENDED DECEMBER 31,
                                                         -----------------------
                                                            2003         2002
                                                         ----------   ----------
    Numerator:
        Net income                                       $1,307,133   $  786,085

        Less preferred dividends                            120,941      106,624
                                                         ----------   ----------

        Net income available to common stockholders       1,186,192      679,461
                                                         ==========   ==========

    Denominator for basic net income per share:
        Weighted average common shares outstanding        4,946,922    3,649,413

    Denominator for diluted net income per share:
        Weighted average common shares outstanding        4,946,922    3,649,413
         Dilutive effect of stock options and warrants      305,609      655,640
                                                         ----------   ----------
             Diluted weighted average shares              5,252,531    4,305,053
                                                         ==========  = =========

    Net income per share:
        Basic                                            $     0.24   $     0.19
        Diluted                                          $     0.23   $     0.16




                                      F-8


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




     Stock-Based Compensation
     ------------------------
     The  Company  accounts  for  stock-based  awards  to  employees  using  the
     intrinsic  value method  described in Accounting  Principles  Board Opinion
     (APB) No. 25,  Accounting  for Stock Issued to  Employees,  and its related
     interpretations.  Accordingly,  no compensation expense has been recognized
     in the  accompanying  consolidated  financial  statements  for  stock-based
     awards to employees or  directors  when the exercise  price of the award is
     equal to or greater  than the quoted  market price of the stock on the date
     of the grant.

     FAS No. 123,  Accounting  for  Stock-Based  Compensation,  and FAS No. 148,
     Accounting  for  Stock-Based  Compensation - Transition and Disclosure - an
     Amendment of FASB Statement No. 123, requires disclosures as if the Company
     had  applied  the fair value  method to  employee  awards  rather  than the
     intrinsic value method.  The fair value of stock-based  awards to employees
     is  calculated  through  the  use of  option  pricing  models,  which  were
     developed for use in  estimating  the fair value of traded  options,  which
     have no vesting restrictions and are fully transferable.  These models also
     require subjective assumptions, including future stock price volatility and
     expected time to exercise,  which greatly affect the calculated values. The
     Company's  fair value  calculations  for awards from stock  option plans in
     2003 and 2002 were made using the  Black-Scholes  option pricing model with
     the following weighted average  assumptions:  expected term, ten years from
     the date of grant; stock price volatility 44% in 2003 and 50% in 2002; risk
     free  interest  rate 4.0% in 2003 and 5.2% in 2002 and no dividends  during
     the  expected  term as the  Company  does not have a history of paying cash
     dividends.

     If the computed fair values of the stock-based awards had been amortized to
     expense  over the vesting  period of the awards,  net income and net income
     per share, basic and diluted, would have been as follows:




                                                                    YEARS ENDED DECEMBER 31,
                                                                   --------------------------
                                                                       2003           2002
                                                                   -----------    -----------
                                                                            

     Net income, as reported                                       $ 1,307,133    $   786,085
     Add: Stock-based employee compensation included in reported
         net income                                                       --             --
     Deduct: Total stock-based employee compensation expense
         determined under fair value method for all awards             (64,000)       (39,000)
                                                                   -----------    -----------
     Net income, pro forma                                         $ 1,243,448    $   747,085
                                                                   -----------    -----------














                                      F-9




                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




     Net income per share:
     Basic, as reported                                            $      0.24    $      0.19
                                                                   ===========    ===========

     Basic, pro forma                                              $      0.23    $      0.18
                                                                   ===========    ===========
     Diluted, as reported                                          $      0.23    $      0.16
                                                                   ===========    ===========
     Diluted, pro forma                                            $      0.21    $      0.15
                                                                   ===========    ===========
     Weighted average fair value of options granted during the
        year                                                       $      3.35    $      2.24
                                                                   ===========    ===========


     Description of Leasing Arrangements
     -----------------------------------
     The  Company's  leasing  operations  principally  consist of the leasing of
     natural gas compressor packages and flare stacks. The leases are classified
     as operating leases. See Note 4.

     Income Taxes
     ------------
     The Company files a consolidated tax return with its subsidiaries. Deferred
     tax assets and liabilities  are recognized for the future tax  consequences
     attributable  to  temporary  differences  between the  financial  statement
     carrying  amounts of assets and liabilities and their respective tax bases,
     and operating losses and tax credit carryforwards.  Deferred tax assets and
     liabilities  are  measured  using  enacted  tax rates  expected to apply to
     taxable  income  in the  years in which  those  temporary  differences  are
     expected to be recovered or settled.

     Use of Estimates
     ----------------
     The  preparation of the Company's  financial  statements in conformity with
     generally accepted accounting  principles requires the Company's management
     to make estimates and assumptions that affect the amounts reported in these
     financial  statements and accompanying  notes.  Actual results could differ
     from those estimates. Significant estimates include the valuation of assets
     and goodwill acquired in acquisitions.  It is at least reasonably  possible
     these  estimates  could be revised in the near term and the revisions would
     be material.

     Recently Issued Accounting Pronouncements
     -----------------------------------------
     In December  2002, the FASB issued FAS No.148,  Accounting for  Stock-Based
     Compensation  - Transition  and Disclosure - an Amendment of FASB Statement
     123. For entities that change their accounting for stock-based compensation
     from the intrinsic  method to the fair value method under FAS 123, the fair
     value method is to be applied.  Two  transition  methods are  permitted for
     adoption  of the fair  value  method.  The  entity can choose to either (i)
     restate  all periods  presented  (retroactive  restatement  method) or (ii)
     recognize  compensation  cost  from the  beginning  of the  fiscal  year of
     adoption  as if the fair value  method had been used to account  for awards
     (modified  prospective  method).  The Company  currently  accounts  for its
     stock-based  compensation using the intrinsic value method as proscribed by
     APB Opinion No. 25, Accounting for Stock Issued to Employees,  and plans on
     continuing  using this method to account for stock options;  therefore,  it
     does not intend to adopt the  transition  requirements  as specified in FAS
     148.

     In June 2003, the FASB approved SFAS 150,  Accounting for Certain Financial
     Instruments with  Characteristics of Both Liabilities and Equity.  SFAS 150
     establishes  standards for how an issuer  classifies  and measures  certain
     financial  instruments with characteristics of both liabilities and equity.
     This  statement  is effective  for  financial  instruments  entered into or
     modified  after May 31, 2003,  and otherwise was effective at the beginning
     of the Company's third quarter of fiscal 2003.  Implementation  of SFAS 150
     did not affect the Company's financial position.




                                      F-10


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


2.   PROPERTY AND EQUIPMENT
     ----------------------

     Property and equipment consists of the following at December 31, 2003:

     Land and building                              $ 1,345,740
     Leasehold improvements                             150,268
     Office equipment and furniture                     152,729
     Software                                           125,905
     Machinery and equipment                            424,080
     Vehicles                                         1,526,452
     Less accumulated depreciation                     (906,736)
                                                    -----------
                                                    $ 2,818,438
                                                    ===========

     Depreciation  expense for property and equipment and the leased compressors
     described  in Note 4 was  $1,681,232  and  $1,137,520  for the years  ended
     December 31, 2003 and 2002, respectively.

3.   ACQUISITION
     -----------

     On March 31, 2003,  the Company  acquired 28 gas  compressor  packages from
     Hy-Bon Engineering Company,  Inc.  ("Hy-Bon").  The adjusted purchase price
     amounted to  approximately  $2,150,000.  As part of the  purchase  and sale
     agreement, Hy-Bon withdrew as a member of Hy-Bon Rotary Compression, L.L.C.
     ("Joint  Venture")  effective as of January 1, 2003.  The  Company,  as the
     other  member,  retained  all  assets  of the Joint  Venture,  which had an
     unaudited  aggregate value of $346,511 as of December 31, 2002. The Company
     dissolved  the Joint  Venture  and  agreed  not to  operate  under the name
     Hy-Bon.  The  Company  consolidated  the  operations  of the Joint  Venture
     beginning  January 1, 2003 and began  recording  its share of the profit of
     the acquired  interest  beginning April 1, 2003.  Prior to the acquisition,
     the Company had owned a  non-controlling  50% interest in the Joint Venture
     and accounted for it on the equity method.

4.   LEASING ACTIVITY
     ----------------

     The  Company  leases  natural  gas  compressor  packages to entities in the
     petroleum industry. The Company's cost and accumulated depreciation for the
     leased  compressors as of December 31, 2003 was $21,965,038 and $2,978,848,
     respectively. These leases are classified as operating leases and generally
     have  original  lease  terms  of  one  to  five  years  and  continue  on a
     month-to-month  basis thereafter.  Future minimum lease payments for leases
     not on a month-to-month basis at December 31, 2003 are as follows:

               Year Ended December 31,
               -----------------------
                        2004                            $   3,548,618
                        2005                                1,935,272
                        2006                                  234,959
                        2007                                   85,423
                                                        -------------
                       Total                            $   5,804,272
                                                        =============




                                      F-11


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


5.   LINE OF CREDIT
     --------------

     The Company has a line of credit with a financial  institution  that allows
     for  borrowings  up to $750,000,  bears  interest at the prime rate plus 1%
     (5.00% at December 31, 2003) and requires  monthly  interest  payments with
     principal  due at  maturity  on  March  26,  2004.  The line of  credit  is
     collateralized  by  substantially  all of the  assets  of the  Company.  At
     December 31, 2003, there was $300,000  outstanding  balance on this line of
     credit.

     The line of credit and first  three  notes  listed in Note 6 below are with
     the same bank and include certain covenants,  the most restrictive of which
     require the Company to maintain certain working capital, debt to equity and
     cash flow  ratios  and  certain  minimum  net  worth.  The  Company  was in
     compliance with all covenants at December 31, 2003.

6.   LONG-TERM DEBT
     --------------




     Long-term debt at December 31, 2003 consisted of the following:

                                                                       
     Note payable to a bank,  interest at bank's prime rate plus
         1.0% but not less than 5.25% (5.25% at December 31, 2003),
         monthly payments of principal of $170,801  plus interest
         until  maturity on September 15, 2007. The note is
         collateralized by substantially all of the assets                $ 7,350,308

     Note  payable to a bank, interest at bank's prime rate plus 1%
         but not less than 5.25% (5.25% at December 31, 2003). This is
         an advance line credit note for $10,000,000. Interest is
         payable monthly. Principal is due in 60 consecutive payments
         beginning December 15, 2004 until November 15, 2009. The note
         is collateralized  by substantially all of the assets of the
         Company. See Note 5 regarding loan covenants                         750,000

     Note payable to a bank, interest at 7%, monthly payments of
         principal and interest totaling $2,614 until maturity in
         September 2010, collateralized by a building                         199,778

     Note payable to an individual, interest at 7%, monthly payments
         of principal and interest totaling $1,255 until maturity
         in October 2009. This note is collateralized by a building            71,584

     Various notes payable to a bank, interest rates ranging from prime
         plus 1% (5.00% at December 31, 2003) to 7.50%                        311,402

     Capital lease                                                             29,135

     Other notes payable for vehicles, various terms                          302,206
                                                                          -----------
     Total                                                                  9,014,413
                                                                          -----------

     Less current portion                                                  (2,363,927)
                                                                          -----------
                                                                          $ 6,650,486
                                                                          ===========



                                      F-12



                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



     Maturities  of long-term  debt based on  contractual  requirements  for the
     years ending December 31 are as follows:

                    2004                             $ 2,363,927
                    2005                               2,450,855
                    2006                               2,337,091
                    2007                               1,376,970
                    2008                                 173,652
                 Thereafter                              311,918
                                                     ------------
                                                     $ 9,014,413
                                                     ============

7.   SUBORDINATED NOTES
     ------------------


     In  2001,  the  Company  completed  an  offering  of  units  consisting  of
     subordinated debt and warrants.  The balance of the subordinated  debt, net
     of  unamortized  discount of $129,918,  is $1,409,343 at December 31, 2003.
     Each unit consists of a $25,000 10% subordinated note due December 31, 2006
     and a five-year  warrant to purchase 10,000 shares of the Company's  common
     stock at $3.25 per  share.  Interest  only is  payable  annually,  with all
     principal  due at maturity.  Warrants to purchase  61,570  shares were also
     granted  on the same  terms to a  placement  agent in  connection  with the
     offering.  Certain stockholders,  officers and directors purchased units in
     the subordinated  debt offering,  (totaling  $259,261 in notes and warrants
     representing   103,704   shares)  on  the  same  terms  and  conditions  as
     non-affiliated  purchasers  in  the  offering.  As of  December  31,  2003,
     warrants were  outstanding from the offering for the purchase of a total of
     626,175 shares.

8.   INCOME TAXES
     ------------

     The provision for income taxes consists of the following:

                                                            2003         2002
                                                         ----------   ----------
     Current provision:
         Federal                                         $     --     $     --
         State                                               25,000       25,900
                                                         ----------   ----------
                                                             25,000       25,900
     Deferred provision:
         Federal                                            592,799      491,363
         State                                               79,000       66,200
                                                         ----------   ----------
                                                            671,799      557,563
                                                         ----------   ----------
                                                         $  696,799   $  583,463
                                                         ==========   ==========

     The  income  tax  effects  of  temporary  differences  that  give  rise  to
     significant portions of deferred income tax assets and (liabilities) are as
     follows:

                                                            2003         2002
                                                         ----------   ----------
     Deferred income tax assets:
         Net operating loss                              $  727,000   $  892,000
         Other                                                5,000       48,000
                                                         ----------   ----------

               Total deferred income tax assets             732,000      940,000
                                                         ----------   ----------




                                      F-13


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



     Deferred income tax liabilities:
         Property and equipment                       (2,410,000)    (1,962,000)
         Goodwill and other intangible assets           (154,000)      (149,000)
         Other                                           (11,000)          --
                                                     -----------    -----------

               Total deferred income tax liabilities  (2,575,000)    (2,111,000)
                                                     -----------    -----------

               Net deferred income tax liabilities   $(1,843,000)   $(1,171,000)
                                                     ===========    ===========

     The effective tax rate differs from the statutory rate as follows:

                                                         2003           2002
                                                     -----------    -----------
          Statutory rate                                     34%            34%
          State and local taxes                               5%             7%
          Other                                             (4)%             2%
                                                     -----------    -----------
          Effective rate                                     35%            43%
                                                     ===========    ===========

     At December 31, 2003, the Company had available  federal net operating loss
     ("NOL")  carryforwards  of approximately  $1,970,000,  which may be used to
     reduce future taxable income and expire in 2020 through 2023.

9.   STOCKHOLDERS' EQUITY
     --------------------

     Initial Public Offering
     -----------------------
     In October, 2002, the Company closed an initial public offering in which it
     sold  1,500,000  shares of common stock and warrants to purchase  1,500,000
     shares of common  stock for a total of  $7,875,000.  Costs and  commissions
     associated  with  the  offering  totaled   $1,345,830.   The  warrants  are
     exercisable  anytime through October 2006 at $6.25 per share. In connection
     with this offering,  the underwriter  received  options to purchase 150,000
     shares of common  stock at $6.25 per share  and  warrants  at  $0.3125  per
     share.  The  warrants,  if  purchased by the  underwriter,  will contain an
     exercise  price of $7.81 per share.  The  underwriter's  options  expire in
     October  2007 and  include a  cashless  exercise  provision  utilizing  the
     Company's common stock.

     Warrants
     --------
     In April 2002 and March 2001,  five-year warrants to purchase 16,472 shares
     of common  stock at $3.25 per share and  68,524  shares at $2.50 per share,
     respectively,  were issued to certain  board  members and  stockholders  as
     compensation  for their debt  guarantees.  These warrants were  immediately
     exercisable  and were recorded at their estimated fair values of $42,025 in
     2002 and $23,137 in 2001. All of these warrants remained  outstanding as of
     December 31, 2003.

     Preferred Stock
     ---------------
     The Company has a total of  5,000,000  authorized  preferred  shares,  with
     rights and  preferences  as designated  by the Board of  Directors.  Of the
     preferred  shares,  381,654 shares are designated 10% Convertible  Series A
     Preferred Stock. (The number of Series A shares authorized was reduced from
     1,177,000 to 381,654 in 2003.) The Series A shares have a cumulative annual
     dividend  rate of 10%,  when and if  declared  by the  Board  of  Directors
     payable thirty days after the end of each quarter.  Holders are entitled to
     one vote per share and the  Series A shares  are  convertible  into  common





                                      F-14


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS




     stock initially at a price of $3.25 per share,  subject to adjustment based
     on the market price and various other contingencies.  In addition, Series A
     shares will  automatically  be converted  to common stock on a  one-for-one
     basis if or when the Company's  common stock trades on a public exchange at
     a price of $6.50 per share or greater  for  twenty  consecutive  days.  The
     Series A shares  have a  liquidation  preference  of $3.25 per  share  plus
     accrued and unpaid  dividends  over common stock.  In  connection  with the
     offering,  the underwriter  received  warrants to purchase 38,165 shares of
     common stock at $3.25 per share through December 1, 2006.

     The  Company  had a private  placement  of its  Series A shares in 2001 and
     2002. In 2003, 38,000 Series A shares were converted to common stock. Total
     Series A shares outstanding at December 31, 2003 were 343,654.

     A total of 18,000 and 12,000 Series A shares were issued in the offering to
     a  director  and  a  stockholder,  respectively,  on  the  same  terms  and
     conditions  as  those  sold to  non-affiliated  purchasers  in the  private
     offering.

10.  STOCK-BASED COMPENSATION
     ------------------------

     Stock Options
     -------------
     In December 1998, the Board of Directors adopted the 1998 Stock Option Plan
     (the  "Plan").  150,000  shares of common  stock  have  been  reserved  for
     issuance under the Plan. All options granted under the Plan will expire ten
     years  after date of grant.  The option  price is to be  determined  by the
     Board of  Directors on date of grant.  The Company has also issued  options
     that are not subject to the Plan.

     In December 2003, the Company granted a total of 12,500 non-qualified stock
     options to its outside  directors to purchase the Company's common stock at
     $5.55 per share any time through  December  2013.  Also, in December  2003,
     options were granted to employees to purchase 15,000 shares of common stock
     at $5.58 per share.  The employee  options vest over three years and expire
     in December 2013.

     In April 2002, the Company  granted 42,000  non-qualified  stock options to
     certain  employees  to purchase  the  Company's  common  stock at $3.25 per
     share.  The  options  vest over three  years and expire in April  2012.  At
     December 31, 2003,  33,000 of these options were  outstanding.  In December
     2002, the Company granted a total of 7,500  non-qualified  stock options to
     its outside  directors to purchase the Company's  common stock at $3.88 per
     share any time through December 2012. All of these options were outstanding
     at December 31, 2003.

     The  following is a summary of activity for the stock  options  outstanding
     for the years ended December 31, 2003 and 2002:













                                      F-15


                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS



                                        DECEMBER 31, 2003      DECEMBER 31, 2002
                                      --------------------   -------------------
                                                  Weighted              Weighted
                                       Number      Average    Number     Average
                                         Of       Exercise      Of      Exercise
                                       Shares       Price     Shares      Price
                                      --------    --------   --------   --------

     Outstanding, beginning of year    161,500    $   2.41    112,000   $   2.00

           Canceled or expired          (9,000)       3.25       --         --
           Granted                      27,500        5.57     49,500       3.35
           Exercised                  (100,000)       2.00       --         --
                                      --------    --------   --------   --------

     Outstanding, end of year           80,000    $   3.92    161,500   $   2.41
                                      ========    ========   ========   ========
     Exercisable, end of year           43,000    $   3.68    128,800   $   2.21
                                      ========    ========   ========   ========

11.  COMMITMENT
     ----------

     401(k) Plan
     -----------
     The Company  offers a 401(k) Plan (the "401(k) Plan") to all employees that
     have reached the age of eighteen and have  completed six months of service.
     The  participants  may  contribute  up to 15%  of  their  salary.  Employer
     contributions  are subject to Board discretion and are subject to a vesting
     schedule  of 20% each year  after the first  year and 100% after six years.
     The Company  contributed $60,735 and $50,233 to the 401(k) Plan in 2003 and
     2002, respectively.

12.  MAJOR CUSTOMERS AND CONCENTRATION OF CREDIT RISK

     Sales to two customers in the year ended December 31, 2003 and one customer
     in the year ended  December 31, 2002  amounted to a total of 38% and 30% of
     consolidated revenue,  respectively. No other single customer accounted for
     more than 10% of the Company's sales in 2003 or 2002. At December 31, 2003,
     no customer  accounted for as much as 10% of the Company's  trade  accounts
     receivable.  The Company generally does not obtain collateral, but requires
     deposits of as much as 50% on large custom contracts.

13.  SEGMENT INFORMATION

     FAS No.  131,  Disclosures  About  Segments  of an  Enterprise  and Related
     Information,  establishes  standards for public  companies  relating to the
     reporting of financial and  descriptive  information  about their operating
     segments in financial  statements.  Operating segments are components of an
     enterprise about which separate financial  information is available that is
     evaluated  regularly by chief operating  decision makers in deciding how to
     allocate resources and in assessing performance.

     The Company identifies its segments based on its subsidiary entities.

     The  Company's  reportable  operating  segments  have  been  determined  as
     separately  identifiable  business  units.  The  Company  measures  segment
     earnings as income before income taxes. The following amounts are expressed
     in thousands:




                                      F-16




                NATURAL GAS SERVICES GROUP, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS


                                                RGS         NGE         GLC       NGSG        Elim.       Total
                                             --------    --------    --------   --------    --------    --------
                                                                                      
     For the year ended December 31, 2003:
     Revenue from external customers         $  2,884    $  4,803    $  5,062   $   --      $   --      $ 12,749
     Inter-segment revenue                      6,558          95          14       --        (6,667)       --
     Gross profit                               1,255       3,418       2,020       --          --         6,693
     Depreciation and amortization                150         888         662         25        --         1,725
     Interest expense                               7         475         162         23        --           667
     Other income                                  (4)        (11)         11       --          --            (4)
     Income taxes                                --          --          --          859        --           859
     Net income (loss)                            170       1,870         890     (1,785)       --         1,145

     As of December 31, 2003:
     Segment assets                             4,495      14,228       9,042        505        --        28,270
     Goodwill                                   1,873        --           717       --          --         2,590

     For the year ended December 31, 2002:
     Revenue from external customers         $  3,298    $  2,319    $  4,680   $   --      $   --      $ 10,297
     Inter-segment revenue                      5,756          45          20       --        (5,821)       --
     Gross profit                               1,329       1,669       1,727       --          --         4,725
     Depreciation and amortization                122         439         558         47        --         1,166
     Interest expense                               9         392         537         38        --           976
     Other income                                   4          15        --         --          --            19
     Equity in the net income of investee
      accounted for by the equity method         --           485        --         --          --           485
     Income taxes                                --          --          --          583        --           583
     Net income (loss)                            411       1,177         364     (1,166)       --           786

     As of December 31, 2002:
     Segment assets                             3,779      10,905       8,587        666        --        23,937
     Goodwill                                   1,873        --           717       --          --         2,590