NGSG
                        NATURAL GAS SERVICES GROUP,INC.


FOR IMMEDIATE RELEASE                                                       NEWS
August 6, 2003                                                Amex - NGS, NGS.WS


               NATURAL GAS SERVICES GROUP ANNOUNCES SECOND QUARTER
                        AND SIX MONTHS FINANCIAL RESULTS

          33% Increase In Revenue For The Three Months to $3.2 Million
            9% Increase In Revenue For The Six Months to $5.6 Million

MIDLAND, Texas, August 6, 2003 - Natural Gas Services Group, Inc. (AMEX:NGS),  a
leading  provider of equipment and services to the natural gas and oil industry,
announced its financial results for the second quarter and six months ended June
30, 2003.

Revenue for the second quarter ended June 30, 2003,  increased 33% to $3,220,815
as compared to  $2,429,160  for the same  period in 2002.  Revenues  for the six
months ended June 30, 2003 increased 9% to $5,564,560, as compared to $5,119,556
for the same period in 2002.  The increase in revenue  during the second quarter
and six months  reflects an  increase in revenue  from the rental of natural gas
compressor  units and also  additional  revenue  recognized from the sale of our
irrigation pump engines.

Net income for the three months ended June 30, 2003,  increased 30% to $ 315,152
or $.06 per share  (diluted),  as compared to net income of $242,933 or $.05 per
share (diluted) for the same period in 2002. Net income for the six months ended
June 30,  2003,  increased  28% to  $433,035  or $.07 per  share  (diluted),  as
compared to net income of $339,109 or $.06 per share  (diluted)  for same period
in 2002.

EBITDA (see  discussion of EBITDA at the end of this  release)  increased 16% to
$1,146,194  for the three months ended June 30,  2003,  versus  $982,609 for the
same period in 2002.  EBITDA  increased 11% to  $1,863,982  for six months ended
June 30, 2003 versus $1,679,112 for the same period in 2002.

NGS's rental  fleet grew by 15% during the six months  ended June 30, 2003.  The
Company ended the quarter with 353 compressor  packages in its rental fleet,  up
from 254 units at June 30, 2002 and 308 units at December 31, 2002.



                                                             Continued on Page 2


Wayne Vinson,  President and CEO of Natural Gas Services  Group,  Inc. said, "We
are extremely pleased with our quarter-to-quarter growth. With a 67% increase in
revenue for the three  months and 53%  increase in revenue for the six months in
our core leasing  business,  the second quarter and six months were  significant
accomplishment  for Natural Gas Services Group. As the second quarter  financial
results show, our core leasing business remains quite  profitable.  We have been
able to do this by  delivering  a  high-value  product to the small to mid-sized
compressor market that meets their critical needs.  Historically,  our equipment
utilization rate remains around 90% and our operating margins are well above the
industry  norms.  As we move into our third  quarter we will  continue  with our
strategic  initiatives.  While the economy  continues to firm up, our goal is to
continue to meet the market demand for our products."


About Natural Gas Services Group, Inc. (NGS)
NGS manufactures, fabricates, sells, leases and services natural gas compressors
that enhance the production of oil and gas wells. The Company also  manufactures
and sells flare  systems  and flare  ignition  systems for plant and  production
facilities.

For More Information, Contact:             Wayne Vinson, CEO or Wallace Sparkman
                                           800-580-1828
                                           Jim Drewitz, Investor Relations
                                           972-355-6070

                                       Or

                  visit the Company's website at www.ngsgi.com

















                                  Page 2 of 5



"EBITDA"  reflects net income or loss before interest,  taxes,  depreciation and
amortization. EBITDA is a measure used by analysts and investors as an indicator
of  operating  cash flow since it excludes  the impact of  movements  in working
capital items, non-cash charges and financing costs. Therefore, EBITDA gives the
investor information as to the cash generated from the operations of a business.
However,  EBITDA is not a measure  of  financial  performance  under  accounting
principles  generally  accepted in the United  States of America  ("GAAP"),  and
should  not  be  considered  a  substitute  for  other  financial   measures  of
performance.  EBITDA as  calculated  by NGS may not be  comparable  to EBITDA as
calculated and reported by other companies.  The most comparable GAAP measure to
EBITDA is net income. The reconciliation of EBITDA to net income is as follows:





                                  Three months ended June 30,     Six months ended June 30,
                                  ---------------------------    ---------------------------

                                      2003            2002           2003            2002
                                  -----------     -----------    -----------     -----------
                                                                     
EBITDA                            $ 1,146,194     $   982,609    $ 1,863,982     $ 1,679,112
  Adjustments to reconcile
  EBITDA to net income:
  Amortization and depreciation      (417,589)       (283,196)      (779,555)       (537,600)
  Interest expense                   (175,706)       (265,480)      (329,789)       (522,840)
  Provision for income tax           (237,747)       (191,000)      (321,603)       (279,563)
                                  -----------     -----------    -----------     -----------
Net income                        $   315,152     $   242,933    $   433,035     $   339,109
                                  ===========     ===========    ===========     ===========




                    ........................................


Except for  historical  information  contained  herein,  the  statements in this
release are  forward-looking  and made pursuant to the safe harbor provisions of
the Private Securities Litigation Reform Act of 1995. Forward-looking statements
involve known and unknown risks and uncertainties,  which may cause NGS's actual
results in future periods to differ  materially from forecasted  results.  Those
risks include,  among other things, the loss of market share through competition
or otherwise;  the introduction of competing  technologies by other companies; a
prolonged,  substantial  reduction  in oil and gas prices  which  could  cause a
decline in the demand for NGS's  products  and  services;  and new  governmental
safety,  health and  environmental  regulations  which could require NGS to make
significant capital  expenditures.  The  forward-looking  statements included in
this press release are only made as of the date of this press  release,  and NGS
undertakes no obligation to publicly update such  forward-looking  statements to
reflect  subsequent  events or  circumstances.  A discussion of these factors is
included in the Company's Annual Report on Form 10-KSB filed with the Securities
and Exchange Commission.






                                  Page 3 of 5






                        Natural Gas Services Group, Inc.
                         Consolidated Income Statements
                                   (unaudited)
                                              Three months ended June 30     Six months ended June 30
                                              --------------------------    --------------------------
                                                  2003           2002           2003           2002
                                              -----------    -----------    -----------    -----------
                                                                               
Revenue:
   Sales                                      $   939,838    $   962,252    $ 1,505,110    $ 2,311,269
   Service and maintenance                        516,573        410,158        893,883        752,020
   Leasing income                               1,764,404      1,056,750      3,165,567      2,056,267
                                              -----------    -----------    -----------    -----------
                                                3,220,815      2,429,160      5,564,560      5,119,556
Cost of revenue:
   Cost of sales                                  713,624        472,567      1,146,797      1,561,452
   Cost of service and maintenance                335,928        348,634        671,229        658,049
   Cost of leasing                                406,867        303,764        767,784        586,299
                                              -----------    -----------    -----------    -----------
                                                1,456,419      1,124,965      2,585,810      2,805,800
                                              -----------    -----------    -----------    -----------
Gross Margin                                    1,764,396      1,304,195      2,978,750      2,313,756
Operating Cost:
   Selling expense                                185,604        119,003        324,551        243,670
   General and administrative expense             410,838        326,946        791,004        600,487
   Amortization & depreciation                    417,589        283,196        779,555        537,600
                                              -----------    -----------    -----------    -----------
                                                1,014,031        729,145      1,895,110      1,381,757
                                              -----------    -----------    -----------    -----------
Operating income                                  750,365        575,050      1,083,640        931,999

   Interest expense                              (175,706)      (265,480)      (329,789)      (522,840)
   Equity in earnings of joint venture               --          124,151           --          207,603
   Other income                                   (21,760)           212            787          1,910
                                              -----------    -----------    -----------    -----------
Income before income taxes                        552,899        433,933        754,638        618,672
   Income tax expense                             237,747        191,000        321,603        279,563
                                              -----------    -----------    -----------    -----------
Net income                                        315,152        242,933        433,035        339,109
   Preferred dividends                             31,010         31,430         62,020         75,614
                                              -----------    -----------    -----------    -----------
Net income available to common shareholders   $   284,142    $   211,503    $   371,015    $   263,495
                                              ===========    ===========    ===========    ===========


         Earnings per share:
         Basic                                $      0.06    $      0.06    $      0.08    $      0.08
         Diluted                              $      0.06    $      0.05    $      0.07    $      0.06
         Weighted average Shares:
         Basic                                  4,875,324      3,357,632      4,866,527      3,357,632
         Diluted                                5,024,774      4,193,490      5,116,332      4,163,710



                                  Page 4 of 5



                        Natural Gas Services Group, Inc.
                           Consolidated Balance Sheet
                                   (unaudited)
                                  June 30, 2003

                                     ASSETS
Current Assets:
   Cash and cash equivalents                                         $   976,004
   Accounts receivable - trade                                         1,482,762
   Inventory                                                           2,292,196
   Prepaid expenses                                                       81,156
                                                                     -----------
   Total current assets                                                4,832,118

Lease equipment, net                                                  16,709,633
Other property, plant and equipment, net                               2,616,661
Goodwill, net                                                          2,589,655
Patents, net                                                             127,684
Other assets                                                             114,605
                                                                     -----------
         Total assets                                                $26,990,356
                                                                     ===========

                      LIABILITIES AND SHAREHOLDERS' EQUITY
Current Liabilities:
   Current portion of long term debt and capital lease               $ 2,278,951
   Accounts payable and accrued liabilities                              973,025
   Unearned Income                                                       588,007
                                                                     -----------
         Total current liabilities                                     3,839,983

Long term debt and capital lease, less current portion                 6,708,947
Subordinated notes, net                                                1,376,865
Deferred income tax payable                                            1,492,573
                                                                     -----------
         Total liabilities                                            13,418,368

                              SHAREHOLDERS' EQUITY
Preferred stock                                                      $     3,577
Common stock                                                              49,816
Paid in capital                                                       11,167,733
Retained earnings                                                      2,350,862
                                                                     -----------
         Total shareholders' equity                                   13,571,988
                                                                     -----------
         Total liabilities and shareholders' equity                  $26,990,356
                                                                     ===========





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