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                UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM 10-QSB

                (X) QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF
                       THE SECURITIES EXCHANGE ACT OF 1934
                For the quarterly period ended September 30, 2002

                                       OR

                 ( ) 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.
       (Exact name of small business issuer as specified in its charter)

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

                                  2911 SCR 1260
                              Midland, Texas 79706
                    (Address of principal executive offices)

                                 (915) 563-3974
                           (Issuer's Telephone number)

                                       N/A
              ----------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report)

                APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY
                   PROCEEDINGS DURING THE PRECEDING FIVE YEARS

  Check whether the registrant filed all documents and reports required to be
 filed by Section 12, 13 or 15(d) of the Exchange Act after the distribution of
                 securities under a plan confirmed by a court.

                                     Yes    No
                                        ---   ---
                      APPLICABLE ONLY TO CORPORATE ISSUERS

State the number of shares outstanding of each of the issuer's classes of common
equity, as of the latest practicable date.

                                                          Outstanding at
           Class                                         October 31, 2002
- -----------------------------                      -----------------------------
Common Stock, $.001 par value                                4,857,632

Transitional Small Business Disclosure Format (Check one):  Yes    No X
                                                               ---   ---
================================================================================



                        NATURAL GAS SERVICES GROUP, INC.

Commission File Number:  1-31398

Quarter Ended September 30, 2002


FORM 10-QSB

Part I - FINANCIAL INFORMATION


Unaudited Consolidated Balance Sheet......................................Page 1


Unaudited Consolidated Income Statements..................................Page 2


Unaudited Consolidated Statements of Cash Flows...........................Page 3


Notes to Unaudited Consolidated Financial Statements......................Page 4


Management's Discussion and Analysis or Plan of Operation.................Page 7


Part II - OTHER INFORMATION..............................................Page 14

Item 6.  Exhibits and Reports on Form 8-K................................Page 14

Signatures...............................................................Page 14






                        Natural Gas Services Group, Inc.
                           Consolidated Balance Sheet
                                   (unaudited)
                               September 30, 2002

                                     ASSETS
                                                                              
Current Assets:
Cash and cash equivalents                                                        $   687,651
Accounts receivable - trade                                                          739,664
Lease receivable - net of unearned interest of $27,120                                92,989
Inventory                                                                          1,807,121
Prepaid expenses                                                                      52,042
                                                                                 -----------
         Total Current Assets                                                      3,379,467
                                                                                 -----------

Property plant and equipment, net:                                                14,624,814
Goodwill, net of accumulated amortization of $325,192                              2,589,655
Patents, net of accumulated amortization of $103,067                                 148,296
Lease receivable net of unearned interest of $13,487                                 139,888
Investments in joint venture                                                         197,486
Deferred offering cost                                                               360,747
Other assets                                                                          30,380
                                                                                 -----------
         Total Assets                                                            $21,470,733
                                                                                 ===========

                      LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities:
Current portion of long term debt and capital lease                              $ 9,509,466
Accounts payable                                                                   1,138,226
Unearned Income                                                                      257,503
                                                                                 -----------
         Total Current Liabilities                                                10,905,195
                                                                                 -----------

Long term portion, less current portion and capital lease                          1,706,042
Subordinated notes, net of discount of $216,526                                    1,322,735
Deferred income tax payable                                                        1,100,000

                              SHAREHOLDERS' EQUITY
Preferred Stock, 5,000,000 shares authorized, par value $0.01:
         10% convertible series A: 1,177,000 shares authorized: 381,654 shares
         Outstanding; 10% cumulative liquidation preference of $1,240,376              3,817
Common Stock, 30,000,000 shares authorized, par value $0.01:
         3,357,632 shares issued and outstanding                                      33,576
Paid in Capital                                                                    4,497,563
Retained Earnings                                                                  1,901,805
                                                                                 -----------
         Shareholders' Equity                                                      6,436,761
                                                                                 -----------
         Total Liabilities and Shareholders' Equity                              $21,470,733
                                                                                 ===========




The accompanying notes are an integral part of the consolidated balance sheet.

                                       1




                        Natural Gas Services Group, Inc.
                         Consolidated Income Statements
                                   (unaudited)

                                              Three months ended September 30    Nine months ended September 30
                                              -------------------------------    -------------------------------
                                                    2002              2001             2002              2001
                                              -------------     -------------    -------------     -------------
                                                                                       
Revenue:
   Sales                                      $   1,877,591     $   1,325,297    $   4,940,880     $   3,946,875
   Leasing income                                 1,203,793         1,006,009        3,260,060         2,282,413
                                              -------------     -------------    -------------     -------------
                                                  3,081,384         2,331,306        8,200,940         6,229,288
                                              -------------     -------------    -------------     -------------
Cost of revenue:
   Cost of sales                                  1,336,629           983,483        3,556,130         2,737,803
   Cost of leasing                                  329,850           290,563          916,149           651,230
                                              -------------     -------------    -------------     -------------
   Total cost of revenue                          1,666,479         1,274,046        4,472,279         3,389,033
                                              -------------     -------------    -------------     -------------
Gross Margin                                      1,414,905         1,057,260        3,728,661         2,840,255
                                              -------------     -------------    -------------     -------------

   Selling expense                                  134,786           135,674          378,456           441,513
   General and Administrative expense               276,523           320,891          877,010           844,395
   Amortization & depreciation                      301,493           268,407          839,093           624,164
                                              -------------     -------------    -------------     -------------
Operating income                                    702,103           332,288        1,634,102           930,183
                                              -------------     -------------    -------------     -------------

   Interest expense                                (273,568)         (280,670)        (796,408)         (652,481)
   Earnings from minority interest                  132,081            70,703          339,684           138,055
   Other income                                      15,316             1,439           17,226            82,571
                                              -------------     -------------    -------------     -------------
Income before income taxes                          575,932           123,760        1,194,604           498,328
                                              -------------     -------------    -------------     -------------
   Income tax expense                               207,000            76,885          486,563           278,363
                                              -------------     -------------    -------------     -------------
Net income                                    $     368,932     $      46,875    $     708,041     $     219,965
                                              -------------     -------------    -------------     -------------
   Preferred dividends                               31,009             3,186          106,624             3,186
                                              -------------     -------------    -------------     -------------
Net income available to common shareholders   $     337,923     $      43,689    $     601,417     $     216,779
                                              =============     =============    =============     =============


         Earnings per share:
         Basic                                $        0.10     $        0.01    $        0.18     $        0.06
         Diluted                              $        0.08     $        0.01    $        0.15     $        0.06
         Weighted average Shares:
         Basic                                    3,357,632         3,357,632        3,357,632         3,357,632
         Diluted                                  4,091,862         3,455,600        4,136,709         3,455,600




The  accompanying  notes  are  an  integral  part  of  the  consolidated  income
statements.

                                       2




                        Natural Gas Services Group, Inc.
                      Consolidated Statements of Cash Flows
                                   (unaudited)
                                                                  Nine Months           Nine Months
                                                                     Ended                 Ended
                                                              September 30, 2002    September 30, 2001
                                                              ------------------    ------------------
                                                                              
CASH FLOWS FROM OPERATING ACTIVITIES:
   Net Income                                                 $          708,041    $          219,965
Adjustments to reconcile net income to net cash provided
  by operating activities:
   Depreciation and amortization                                         839,093               624,164
   Deferred taxes                                                        486,563               278,363
   Amortization of debt issuance costs                                    48,717                37,891
   Gain on disposal of assets                                            (15,066)              (71,964)
   Warrants issued for debt guarantee                                     42,025                23,137
   Earning from minority interest                                       (339,684)             (138,055)
Changes in current assets and liabilities:
   Trade and other receivables                                           246,047              (383,889)
   Inventory                                                            (191,713)             (437,981)
   Prepaid expenses and other                                            (85,097)             (199,945)
   Accounts payable and accrued liabilities                              157,906               708,597
   Deferred income                                                        74,129               (10,108)
   Other                                                                 (26,209)               (2,554)
                                                              ------------------    ------------------
  NET CASH PROVIDED BY OPERATING ACTIVITIES                            1,944,752               647,621
                                                              ------------------    ------------------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Purchase of property and equipment                                 (3,025,780)           (1,887,171)
   Proceeds from sale of property and equipment                           40,000               179,923
   Acquisition of compression related assets of Great Lakes                 --              (1,295,180)
   Compression
   Decrease in lease receivable                                           62,543                54,296
   Minority interest investment                                          260,868                77,592
                                                              ------------------    ------------------
  NET CASH USED IN INVESTING ACTIVITIES                               (2,662,369)           (2,870,540)
                                                              ------------------    ------------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Net proceeds from bank loans                                        1,853,386               926,759
   Repayments of long term debt                                         (647,004)             (506,892)
   Dividends paid on preferred stock                                     (75,613)               (3,186)
   Proceeds from note offering, net of offering cost                        --               1,372,196
   Deferred offering cost                                               (250,937)                 --
   Proceeds from warrants                                                     43                  --
   Proceeds from sale of preferred stock                                  12,724               407,485
                                                              ------------------    ------------------
NET CASH PROVIDED BY INVESTING ACTIVITIES                                892,599             2,196,362
                                                              ------------------    ------------------
NET INCREASE (DECREASE) IN CASH                                          174,982               (26,557)
CASH AT BEGINNING OF PERIOD                                              512,669               142,906
                                                              ------------------    ------------------
CASH AT END OF PERIOD                                         $          687,651    $          116,349
                                                              ==================    ==================




The accompanying  notes are an integral part of the  consolidated  statements of
cash flow.

                                       3


                        NATURAL GAS SERVICES GROUP, INC.



                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(1)  Organization

     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  providing
services to a customer base of oil and gas exploration and production  companies
operating primarily in California,  Colorado,  Kansas, Louisiana,  Michigan, New
Mexico, Oklahoma, Texas and Wyoming.

(2)  Basis of Presentation

     The accompanying  unaudited  financial  statements present the consolidated
results of the Company and its wholly-owned  subsidiaries taken from the Company
books and  records.  However,  in the opinion of  management,  such  information
includes all adjustments, consisting of only normal recurring adjustments, which
are necessary to make the Company's financial position at September 30, 2002 and
the  results  of its  operations  for the three  and nine  month  periods  ended
September  30,  2002 and 2001 not  misleading.  As  permitted  by the  rules and
regulations  of the Securities and Exchange  Commission  (SEC) the  accompanying
financial  statements  do not  include  all  disclosures  normally  required  by
generally accepted accounting  principals.  These financial statements should be
read in conjunction  with the financial  statements  included with the Company's
Registration  Statement on Form SB-2 on file with the SEC.  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.  In the  opinion  of  management,  the
consolidated  financial  statements  are a fair  presentation  of the  financial
position, results of operations and cash flows for the period presented.

     The results of operations for the three and nine months ended September 30,
2002 are not necessarily  indicative of the results of operations to be expected
for the full fiscal year ending December 31, 2002


(3)  Subsequent Events

     Public Stock Offering - In October 2002,  the Company  completed an initial
public  stock  offering  of  1,500,000  shares of common  stock and  warrants to
purchase  1,500,000  shares of common stock which provided gross proceeds to the
Company of approximately $7,875,000.

Each  warrant  allows the  holder to  purchase  one share of common  stock at an
exercise  price of $6.25 for a period of 4 years after the date of the offering.
The  warrants  are  redeemable  by the Company at $0.25 per warrant upon 30 days
notice if the market price of the common stock for 20  consecutive  trading days
preceding  the date the notice is given  equals or exceeds  175% of the exercise
price  of  the  warrant  or  $10.94.  The  underwriters  have  a 60  day  option
(over-allotment  option) to  purchase up to 225,000  shares of common  stock and
225,000 warrants at the respective offering prices.

The  Company  also issued the  representative  of the  underwriters'  options to
purchase  150,000  shares  of  common  stock  and  150,000  warrants,  that  are
exercisable  beginning one year from the public  offering date for a period of 5
years, at 125% of the Company's public offering price. The representative of the
underwriters'  options are  exercisable at prices of $6.25 and $0.3125 per share
and per warrant, respectively. Each warrant is exercisable at $7.8125.


                                       4




                        NATURAL GAS SERVICES GROUP, INC.


     Long  Term Debt - In  connection  with  completion  of its  initial  public
offering,  the Company signed an amended credit  agreement with its bank whereby
it borrowed an  additional  $3,500,000,  in the form of a term loan with monthly
principal  payments of $58,333 with interest at 1% over prime for 60 months. The
proceeds  from this loan as well as  $3,452,464  of the proceeds from the public
offering  were used to retire the  remaining  $6,952,464 of debt due to Dominion
Michigan  Production  Services,  Inc (Dominion Michigan) for the purchase of its
compression  related  assets that are  operated by our  subsidiary,  Great Lakes
Compression, Inc. (Great Lakes Compression).

(4)  Goodwill- Adoption of Statement 142 (Unaudited)

The  Company  adopted  FAS 142 on January  1, 2002,  at which time it ceased the
amortization  of goodwill.  At September 30, 2002, the Company's  goodwill had a
carrying  value of  $2,589,655.  Pursuant to FAS 142, the Company  completed its
initial  test for goodwill  impairment  and no  impairment  was  indicated.  The
following  table  sets  forth  the  effect of the  adoption  of FAS 142 for each
period:

                             FOR THE NINE MONTHS ENDED     FOR THE THREE MONTHS ENDED
                                    SEPTEMBER 30,                 SEPTEMBER 30,
                           ----------------------------   ----------------------------
                                2002            2001           2002            2001
                           ------------    ------------   ------------    ------------
                                                              
    Reported net income    $    601,417    $    216,779   $    337,923    $     43,689
    Add back: Goodwill
       amortization, net
       of tax effect                 --          75,303             --          25,101
    Adjusted net income    $    601,417    $    292,082   $    337,923    $     68,790

    Basic earnings per
    share:
       Reported net
       income              $        .18    $        .06   $        .10    $        .01
       Goodwill
       amortization                  --             .02             --             .01
       Adjusted net
       income              $        .18    $        .08   $        .10    $        .02

    Diluted earnings per
    share:
       Reported net
       income              $        .15    $        .06   $        .08    $        .01
       Goodwill
       amortization                  --             .02             --             .01
       Adjusted net
       income              $        .15    $        .08   $        .08    $        .02






                                       5




                        NATURAL GAS SERVICES GROUP, INC.


(5)  Segment information

     FAS No.  131,  Disclosures  about  Segments  of an  Enterprise  and Related
Information,   establishes  standards  for  public  companies  relating  to  the
reporting of 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.

                                                                            Natural Gas
         (in thousands)            Rotary          NGE       Great Lakes      Services
                                    Gas          Leasing     Compression       Group          Total
        Nine Months Ended
       September 30, 2002
                                                                            
Revenue                         $     2,856    $     1,684   $     3,661    $      --      $     8,201
Inter-segment revenue                 4,064                                      (4,064)          --
Net Income                              504            850           252           (898)           708
Segment Assets                        4,064          7,360         9,165            882         21,471



                                                                            Natural Gas
         (in thousands)            Rotary          NGE       Great Lakes      Services
                                    Gas          Leasing     Compression       Group          Total
       Three Months Ended
       September 30, 2002
Revenue                         $     1,285    $       625   $     1,171    $      --      $     3,081
Inter-segment revenue                   980                                        (980)          --
Net Income                              274            335            97           (338)           368
Segment Assets                        4,064          7,360         9,165            882         21,471



                                                                            Natural Gas
         (in thousands)            Rotary          NGE       Great Lakes      Services
                                    Gas          Leasing     Compression       Group          Total
        Nine Months Ended
       September 30, 2001
Revenue                         $     3,039    $     1,086   $     2,104    $      --      $     6,229
Inter-segment revenue                 1,869                                      (1,869)          --
Net Income                              198            390           239           (607)           220
Segment Assets                        2,259          4,618         9,007          2,529         18,413



                                                                            Natural Gas
         (in thousands)            Rotary          NGE       Great Lakes      Services
                                     Gas         Leasing     Compression       Group          Total
       Three Months Ended
       September 30, 2001
Revenue                         $       869    $       391   $     1,071    $      --      $     2,331
Inter-segment revenue                   733                                        (733)          --
Net Income                              (52)           140           156           (197)            47
Segment Assets                        2,259          4,618         9,007          2,529         18,413











                                       6




                        NATURAL GAS SERVICES GROUP, INC.

Management's  Discussion  and  Analysis of  Financial  Condition  and Results of
Operation

     Overview

     We include  the  operations  of 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,  service,  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  are  the  parent  company  and  provide
administrative and management support and,  therefore,  have expenses associated
with that activity.

     We acquired the compression  related assets of Great Lakes Compression from
Dominion  Michigan on March 29, 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.

Results of Operations

Nine Months Ended September 30, 2002 Compared to the Nine Months Ended September
30, 2001

                                                                                       Natural Gas
         (in thousands)                   Rotary          NGE          Great Lakes       Services
                                            Gas         Leasing      Compression (1)      Group          Total
                                        -----------   -----------    ---------------   -----------    -----------
                                                                                       
        Nine Months Ended
       September 30, 2002
Revenue                                 $     2,856   $     1,684    $         3,661   $      --      $     8,201
Inter-segment revenue                         4,064                                         (4,064)          --
Gross margin                                  1,198         1,209              1,322          --            3,729

Selling, general and administrative
     expense                                    600           120                188           347          1,255
Depreciation and amortization
     expense                                     90           303                412            34            839
Interest expense                                  6           291                470            30            797
Other income                                      2            15                                              17
Equity in earnings from joint venture                         340                                             340
Income tax                                                                                     487            487
                                        -----------   -----------    ---------------   -----------    -----------
Net Income                              $       504   $       850    $           252   $      (898)   $       708
                                        ===========   ===========    ===============   ===========    ===========

        Nine Months Ended
       September 30, 2001
Revenue                                 $     3,039   $     1,086    $         2,104   $      --      $     6,229
Inter-segment revenue                         1,869                                         (1,869)          --
Gross margin                                  1,051           763              1,026          --            2,840

Selling, general and administrative
     expense                                    774           108                185           219          1,286
Depreciation and amortization
     expense                                     78           180                280            86            624
Interest expense                                  3           303                322            24            652
Other income                                      2            80                                              82
Equity in earnings from joint venture                         138                                             138
Income tax                                                                                     278            278
                                        -----------   -----------    ---------------   -----------    -----------
Net income                              $       198   $       390    $           239   $      (607)   $       220
                                        ===========   ===========    ===============   ===========    ===========

_______

(1) We purchased the compression  related assets of Great Lakes Compression from
Dominion Michigan on March 29, 2001.  Therefore,  the information of Great Lakes
Compression for the period ending March 31, 2001, is not included.



                                       7


                        NATURAL GAS SERVICES GROUP, INC.


Rotary Gas Systems Operations

     Revenue  from  outside   sources   decreased   approximately   $183,000  or
approximately  6% for the nine months ended  September  30, 2002 compared to the
same period ended  September  30, 2001.  Because our products are  custom-built,
fluctuations in revenue from outside sources are expected.  Our main focus is to
build our rental fleet and associated lease revenue in NGE Leasing, which in the
long term is more  profitable  and has a more  stable  cash  flow.  For the nine
months ended September 30, 2001,  approximately 58% of our plant output was used
to build gas compressors for NGE Leasing as opposed to approximately 80% for the
same period in 2002.

     The gross margin  percentage  increased  from 35% for the nine months ended
September  30, 2001, to 42% for the same period ended  September  30, 2002.  The
slight increase resulted mainly from some change in the sales product mix.

     Selling,  general and  administrative  expense decreased from $774,000,  to
$600,000 or 22% for the nine months ended September 30, 2001, as compared to the
same  period  ended  September  30,  2002.  This was  mainly  the  result of the
reduction of selling  expenses  related to the decision to  discontinue  the air
compressor line. We discontinued  this line of product in the development  stage
so that we could concentrate on our main product, gas compression.

     Depreciation  expense  increased  15% from  $78,000 to $90,000 for the nine
months ended September 30, 2001, compared to the same period ended September 30,
2002. This increase was mainly due to the purchase of additional vehicles,  shop
and office equipment.

     There was a $3,000  increase in interest  expense for the nine months ended
September 30, 2002 compared to the same period ended September 30, 2001,  mainly
due to financing the purchase of additional service vehicles.

NGE Leasing Operations

     Revenue from rental of natural gas  compressors  increased 55% for the nine
months  ended  September  30,  2002,  compared to the same period in 2001.  This
increase  is the  result of the  increase  in our  rental  fleet of which 66 new
compressors  were added during the nine months  ended  September  30,  2002,  as
compared to the addition of 30 during the 2001 period.  These  compressors  were
manufactured by Rotary Gas Systems.

     The gross margin  percentage  increased  2% from 70% for the period  ending
September  30, 2001 to 72% for the same  period in 2002.  The cost of revenue is
comprised  mainly  of  expenses  associated  with  the  maintenance  of the  gas
compressor rental activity.  This increase resulted from the fact that of the 66
new compressors added to our rental fleet in the nine months ended September 30,
2002, 48 were the new GS 10 model which have a lower percentage maintenance cost
than other models in our fleet.  Normally the cost of equipment maintenance will
naturally  increase over time as the equipment ages,  thereby reducing the gross
margin.  The expected  life of a gas  compressor  unit will exceed 15 years with
routine maintenance and a major overhaul every three to four years.

     Selling,  general and  administrative  expense  increased  from $108,000 to
$120,000 or 11% for the nine months ended September 30, 2002, as compared to the
same period in 2001.  This was mainly the result of an  increase  in  commission
expense.


                                       8


                        NATURAL GAS SERVICES GROUP, INC.

     Depreciation  expense  increased 68% from $180,000 to $303,000 for the nine
months ended September 30, 2001, compared to the same period ended September 30,
2002.  This  increase  was the result of new gas  compressor  rental units being
added to the rental fleet during the period.

     There was a decrease in interest  expense from $303,000 to $291,000 for the
nine months  ended  September  30,  2001 as  compared  to the same period  ended
September 30, 2002. .This is mainly a result of a reduction in bank debt.

     Equity in earnings  from a joint  venture  increased  146% from $138,000 to
$340,000 during the nine months ended  September 30, 2001,  compared to the same
period ended September 30, 2002.  This is a joint venture,  called Hy-Bon Rotary
Compression,  LLC that serves a mutual  area of interest in which we  contribute
gas compressor units for rental.  The increase is due to net profits  associated
with the additional units leased in 2002 as compared to those in 2001.

Great Lakes Compression

     We acquired the compression  related assets of Great Lakes Compression from
Dominion  Michigan  as of March  29,  2001.  Therefore,  there is no  historical
comparative data for the nine months ended September 30, 2001.

Natural Gas Services Group

     Selling,  general and  administrative  expense  increased  from $219,000 to
$347,000 or 58% for the nine months ended September 30, 2001, as compared to the
same period ended  September  30,  2002.  This was mainly the result of an added
expense for warrants valued at $42,000 granted to certain officers and directors
as consideration for their guarantee of restructured  corporate bank debt and an
increase in accrual for officer bonuses normally paid at year end.

     Amortization and depreciation  expense decreased from $86,000 to $34,000 or
60% for the nine months  ended  September  30, 2001  compared to the same period
ended  September 30, 2002. This decrease was mainly the result of changes in the
accounting method for amortizing goodwill.

     Interest  expense  increased  from  $24,000  to $30,000 or 25% for the nine
months ended  September 30, 2001 compared to the same period ended September 30,
2002.  This  increase  was the result of  financing  the  purchase  on three new
service vehicles.

     Income tax expense is accounted for on a consolidated basis. Therefore, the
tax for all  companies  is included in the tax expense for Natural Gas  Services
Group.  Income tax expense  increased 75% from $278,000 to $487,000 for the nine
months ended  September  30, 2001  compared to same period ended  September  30,
2002. This increase is mainly due to an increase in income before taxes.


                                       9




                        NATURAL GAS SERVICES GROUP, INC.

Three Months Ended September 30, 2002 Compared to the Three Months Ended September 30, 2001

         (in thousands)                                                              Natural Gas
                                           Rotary          NGE        Great Lakes      Services
                                            Gas          Leasing      Compression       Group          Total
                                        -----------    -----------    -----------    -----------    -----------
                                                                         
       Three Months Ended
       September 30, 2002
Revenue                                 $     1,285    $       625    $     1,171    $              $     3,081
Inter-segment revenue                           980                                         (980)          --
Gross margin                                    509            448            458                         1,415
Selling, general and administrative
     expense                                    203             40             62            107            412
Depreciation and amortization
     expense                                     31            114            143             13            301
Interest expense                                  2            105            156             11            274
Other income                                      1             14                                           15
Equity in earnings from joint venture                          132                                          132
Income tax                                                                                   207            207
                                        -----------    -----------    -----------    -----------    -----------
Net Income                              $       274    $       335    $        97    $      (338)   $       368
                                        ===========    ===========    ===========    ===========    ===========

       Three Months Ended
       September 30, 2001

Revenue                                 $       869    $       391    $     1,071    $              $     2,331
Inter-segment revenue                           733                                         (733)          --
Gross margin                                    243            267            547                         1,057
Selling, general and administrative
     expense                                    269             22             86             80            457
Depreciation and amortization
     expense                                     27             68            142             31            268
Interest expense                                  1            108            163              9            281
Other income                                      2                                                           2
Equity in earnings from joint venture                           71                                           71
Income tax                                                                                    77             77
                                        -----------    -----------    -----------    -----------    -----------
                                        $       (52)   $       140    $       156    $      (197)   $        47
                                        ===========    ===========    ===========    ===========    ===========

_______

Rotary Gas Systems Operations

     Revenue from outside sources increased $416,000 or 48% for the three months
ended  September 30, 2002 compared to the same period ended  September 30, 2001.
Because our  products  are  custom-built,  fluctuations  in revenue from outside
sources are  expected.  This  increase  was mainly the result of the  additional
number of gas  compressor  units sold during the period.  We sold 10  compressor
units in the three months ended  September  30, 2002 as compared to only 6 units
in the same period ended September 30, 2001.

     The gross margin  percentage  increased from 28% for the three months ended
September  30, 2001, to 40% for the same period ended  September 30, 2002.  This
increase resulted mainly from a change in the sales product mix.

     Selling,  general and  administrative  expense  decreased  from $269,000 to
$203,000 or 25% for the three months ended  September  30, 2001,  as compared to
the same period  ended  September  30,  2002.  This was mainly the result of the
reduction of selling  expenses  related to the decision to  discontinue  the air
compressor line. We discontinued  this line of product in the development  stage
so that we could concentrate on our main product, gas compression.



                                       10


                        NATURAL GAS SERVICES GROUP, INC.

     Depreciation  expense  increased  15% from $27,000 to $31,000 for the three
months ended September 30, 2001, compared to the same period ended September 30,
2002.  This  increase  was  mainly due to the  purchase  of  additional  service
vehicles, shop and office equipment.

     There was a $1,000 increase in interest  expense for the three months ended
September 30, 2002 compared to the same period ended September 30, 2001,  mainly
due to financing the purchase of additional service vehicles.

NGE Leasing Operations

     Revenue from rental of natural gas compressors  increased 60% for the three
months  ended  September  30,  2002,  compared to the same period in 2001.  This
increase  is the  result of the  increase  in the  number of units  added to our
rental fleet.

     The gross  margin  percentage  increased  4% from 68% for the three  months
ending  September  30,  2001 to 72% for the same  period  in  2002.  The cost of
revenue is comprised  mainly of expenses  associated with the maintenance of the
gas compressor rental activity. This increase mainly resulted from change in the
rental  fleet  makeup to include the GS-10 model  compressor,  which has a lower
percentage of maintenance cost.

     Selling,  general and  administrative  expense  increased  from  $22,000 to
$40,000 for the three months ended  September  30, 2002, as compared to the same
period in 2001.  This was mainly the result of an increase in sales  commissions
from increased rental revenue.

     Depreciation  expense  increased 68% from $68,000 to $114,000 for the three
months ended September 30, 2001, compared to the same period ended September 30,
2002.  This  increase  was the result of new gas  compressor  rental units being
added to the rental fleet during the period.

     There was a decrease in interest  expense from $108,000 to $105,000 for the
three  months  ended  September  30, 2002 as  compared to the same period  ended
September 30, 2001. This is mainly as a result of a reduction in bank debt.

     Equity in  earnings  from a joint  venture  increased  86% from  $71,000 to
$132,000 during the three months ended September 30, 2001,  compared to the same
period ended September 30, 2002.  This is a joint venture,  called Hy-Bon Rotary
Compression,  LLC that serves a mutual  area of interest in which we  contribute
gas compressor units for rental.  The increase is due to net profits  associated
with the additional units leased in 2002 as compared to those in 2001.

Great Lakes Compression

     Revenue from rental of natural gas  compressors  increased 9% for the three
months  ended  September  30,  2002,  compared to the same period in 2001.  This
increase  is the  result of the  increase  in the  number of units  added to our
rental fleet offset by an increase in idle units.

     The gross  margin  percentage  decreased  12% from 51% for the three months
ending  September  30,  2001 to 39% for the same  period  in  2002.  The cost of
revenue is  comprised of expenses  associated  with the  maintenance  of the gas
compressor  rental activity,  service,  parts and manufacturing  expenses.  This
decrease mainly resulted from a reduced margin on parts sold during the period.



                                       11


                        NATURAL GAS SERVICES GROUP, INC.

     Selling,  general and  administrative  expense  decreased  from  $86,000 to
$62,000 for the three months ended  September  30, 2002, as compared to the same
period in 2001. This was mainly the result of a decrease in insurance, legal and
telephone expense.

     Depreciation  expense increased only slightly from $142,000 to $143,000 for
the three months  ended  September  30, 2001,  compared to the same period ended
September 30, 2002.

     There was a slight  decrease in interest  expense from $163,000 to $156,000
for the three  months  ended  September  30, 2002 as compared to the same period
ended September 30, 2001.

     Natural Gas Services Group

     Selling,  general and  administrative  expense  increased  from  $80,000 to
$107,000 or 34% for the three months ended  September  30, 2001,  as compared to
the same period ended September 30, 2002. This was mainly the result of an added
expense for accrual of officer bonuses.

     Amortization and depreciation  expense decreased from $31,000 to $13,000 or
58% for the three months ended  September  30, 2001  compared to the same period
ended  September 30, 2002. This decrease was mainly the result of changes in the
accounting method for amortizing goodwill.

     Interest  expense  increased  from  $9,000 to  $11,000 or 22% for the three
months ended  September 30, 2001 compared to the same period ended September 30,
2002.  This  increase  was the result of  financing  the  purchase  on three new
service vehicles.

     Income tax expense is accounted for on a consolidated basis. Therefore, the
tax for all  companies  is included in the tax expense for Natural Gas  Services
Group.  Income tax expense increased 169% from $77,000 to $207,000 for the three
months ended  September  30, 2001  compared to same period ended  September  30,
2002. This increase is mainly due to an increase in income before taxes.

Liquidity and Capital Resources

     We have funded our operations  through private  offerings of our common and
preferred stock,  subordinated debt and bank debt.  Proceeds were primarily used
to fund the manufacture and fabrication of additional units for our rental fleet
of gas compressors.

     At September  30, 2002,  we had cash and cash  equivalents  of $688,000,  a
working capital deficit of $7,526,000 and  non-subordinated  debt of $11,216,000
of which  approximately  $9,509,000 was classified as current. We had $1,945,000
of net cash flow from operating activities during the first nine months of 2002.
This  was  primarily  from  net  income  of  $708,000  plus   depreciation   and
amortization  of  $839,000,  an increase in  deferred  taxes of $487,000  and an
increase in deferred  income of $74,000  offset by an increase in inventory  and
prepaid expense.

     On October 24, 2002 we paid off the note of $6,952,464  payable to Dominion
Michigan , used for the acquisition of the  compression  related assets of Great
Lakes  Compression.  $3,452,464  of the  funds  to pay the  note  came  from the
proceeds of our initial public  offering,  and $3,500,000  came from  additional
bank financing to be amortized over 60 months at prime plus 1%.

     Funds from the initial public  offering,  which closed on October 24, 2002,
will permit us to actively pursue adding gas compressors to our rental fleet. We
expect to fund additional  rental units though the use of the offering  proceeds
and cash flow from  operations.  We believe  that the revenue  generated  by our
operations  and the  proceeds  from our  offering  will be  adequate to meet our
anticipated cash, capital and debt service requirements.


                                       12


Item 3.  Controls and Procedures

(a)  Evaluation of disclosure controls and procedures.

Under the supervision and with the  participation  of our management,  including
our chief  executive  officer and chief  financial  officer,  we  evaluated  the
effectiveness  of the  design  and  operation  of our  disclosure  controls  and
procedures  (as defined in Rule 13a-14(c)  under the Securities  Exchange Act of
1934) as of a date (the  "Evaluation  Date")  within 90 days prior to the filing
date of this report. Based upon that evaluation, our chief executive officer and
chief  financial  officer  concluded  that,  as  of  the  Evaluation  Date,  our
disclosure  controls and procedures are effective in timely alerting them to the
material information relating to us and our consolidated  subsidiaries  required
to be included in our periodic filings with the SEC.

(b)  Changes in internal controls.

There were no  significant  changes  made in our  internal  controls  during the
period covered by this report or, to our knowledge,  in other factors that could
significantly affect these controls subsequent to the date of their evaluation.





















                                       13


                        NATURAL GAS SERVICES GROUP, INC.


Commission File Number:  1-31398
Quarter Ended September 30, 2002
Form 10-QSB

PART II - OTHER INFORMATION


Item 6.  Exhibits and Reports on Form 8-K

(a)  Exhibits

     99.1 Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section
          1350

     99.2 Certification of Chief Financial Officer Pursuant to 18 U.S.C. Section
          1350

(b)  Reports on Form 8-K

     None.


SIGNATURES

In accordance with the  requirements of the Exchange Act, the registrant  caused
this  report to be  signed on its  behalf  by the  undersigned,  thereunto  duly
authorized.


NATURAL GAS SERVICES GROUP, INC.


By: /s/ Wayne L. Vinson
   -----------------------------
   Wayne L. Vinson
   President and Chief Executive
   Officer

By:  /s/ Earl R. Wait
   -----------------------------
   Earl R. Wait
   Chief Financial Officer
   and Treasurer

November 12, 2002








                                       14


                        NATURAL GAS SERVICES GROUP, INC.

                                  CERTIFICATION


     I, Wayne L. Vinson, certify that:

     1. I have  reviewed  this  quarterly  report on Form  10-QSB of Natural Gas
Services Group, Inc.;

     2. Based on my knowledge, this quarterly report does not contain any untrue
statement of a material fact or omit to state a material fact  necessary to make
the statements made, in light of the  circumstances  under which such statements
were made, not  misleading  with respect to the period covered by this quarterly
report;

     3. Based on my knowledge,  the financial  statements,  and other  financial
information  included in this quarterly  report,  fairly present in all material
respects the financial  condition,  results of operations  and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

     4. The  registrant's  other  certifying  officers and I are responsible for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and have:

     (a)  designed  such  disclosure  controls  and  procedures  to ensure  that
          material  information  relating  to  the  registrant,   including  its
          consolidated subsidiaries,  is made known to us by others within those
          entities,  particularly  during  the  period in which  this  quarterly
          report is being prepared;

     (b)  evaluated the  effectiveness of the registrant's  disclosure  controls
          and procedures as of a date within 90 days prior to the filing date of
          this quarterly report (the "Evaluation Date"); and

     (c)  presented  in  this  quarterly   report  our  conclusions   about  the
          effectiveness  of the disclosure  controls and procedures based on our
          evaluation as of the Evaluation Date;

     5. The registrant's other certifying  officers and I have disclosed,  based
on our most  recent  evaluation,  to the  registrant's  auditors  and the  audit
committee  of  registrant's  board  of  directors  (or  persons  performing  the
equivalent functions):

     (a)  all  significant  deficiencies  in the design or operation of internal
          controls  which could  adversely  affect the  registrant's  ability to
          record,  process,   summarize  and  report  financial  data  and  have
          identified for the  registrant's  auditors any material  weaknesses in
          internal controls; and

     (b)  any fraud, whether or not material,  that involves management or other
          employees who have a  significant  role in the  registrant's  internal
          controls; and



                                       15


     6. The registrant's other certifying  officers and I have indicated in this
quarterly  report  whether or not there  were  significant  changes in  internal
controls or in other factors that could  significantly  affect internal controls
subsequent to the date of our most recent  evaluation,  including any corrective
actions with regard to significant deficiencies and material weaknesses.




                                                 /s/ Wayne L. Vinson
Date: November 12, 2002                         --------------------------------
                                                Wayne L. Vinson
                                                Title:   Chief Executive Officer



























                                       16


                        NATURAL GAS SERVICES GROUP, INC.

                                  CERTIFICATION

     I, Earl R. Wait, certify that:

     1. I have  reviewed  this  quarterly  report on Form  10-QSB of Natural Gas
Services Group, Inc.;

     2. Based on my knowledge, this quarterly report does not contain any untrue
statement of a material fact or omit to state a material fact  necessary to make
the statements made, in light of the  circumstances  under which such statements
were made, not  misleading  with respect to the period covered by this quarterly
report;

     3. Based on my knowledge,  the financial  statements,  and other  financial
information  included in this quarterly  report,  fairly present in all material
respects the financial  condition,  results of operations  and cash flows of the
registrant as of, and for, the periods presented in this quarterly report;

     4. The  registrant's  other  certifying  officers and I are responsible for
establishing and maintaining  disclosure  controls and procedures (as defined in
Exchange Act Rules 13a-14 and 15d-14) for the registrant and have:

     (a)  designed  such  disclosure  controls  and  procedures  to ensure  that
          material  information  relating  to  the  registrant,   including  its
          consolidated subsidiaries,  is made known to us by others within those
          entities,  particularly  during  the  period in which  this  quarterly
          report is being prepared;

     (b)  evaluated the  effectiveness of the registrant's  disclosure  controls
          and procedures as of a date within 90 days prior to the filing date of
          this quarterly report (the "Evaluation Date"); and

     (c)  presented  in  this  quarterly   report  our  conclusions   about  the
          effectiveness  of the disclosure  controls and procedures based on our
          evaluation as of the Evaluation Date;

     5. The registrant's other certifying  officers and I have disclosed,  based
on our most  recent  evaluation,  to the  registrant's  auditors  and the  audit
committee  of  registrant's  board  of  directors  (or  persons  performing  the
equivalent functions):

     (a)  all  significant  deficiencies  in the design or operation of internal
          controls  which could  adversely  affect the  registrant's  ability to
          record,  process,   summarize  and  report  financial  data  and  have
          identified for the  registrant's  auditors any material  weaknesses in
          internal controls; and

     (b)  any fraud, whether or not material,  that involves management or other
          employees who have a  significant  role in the  registrant's  internal
          controls; and


                                       17


     6. The registrant's other certifying  officers and I have indicated in this
quarterly  report  whether or not there  were  significant  changes in  internal
controls or in other factors that could  significantly  affect internal controls
subsequent to the date of our most recent  evaluation,  including any corrective
actions with regard to significant deficiencies and material weaknesses.

                                                 /s/ Earl R. Wait
Date: November 12, 2002                         --------------------------------
                                                Earl R. Wait
                                                Title:   Chief Financial Officer





















                                       18


                                  EXHIBIT INDEX

Exhibit 99.1   Certification  of Chief Executive  Officer  Pursuant to 18 U.S.C.
               Section 1350

Exhibit 99.2   Certification  of Chief Financial  Officer  Pursuant to 18 U.S.C.
               Section 1350




























                                       19