Release Details

MIDLAND, Texas, July 25 /PRNewswire-FirstCall/ -- Natural Gas Services Group, Inc. (Amex: NGS), a leading gas compression and flare equipment and services provider to the oil and natural gas industry, announces it plans to release its 2005 second quarter and six months financial results on Thursday, August 4, 2005 at 8:25 AM Central Daylight Time. In conjunction with the release, the Company has scheduled a conference call Thursday, August 4 at 3:00 PM Central Daylight Time.

     What:   Natural Gas Services 2005 Second Quarter and Six Months Financial
             Results Conference Call

     When:   Thursday, August 4, 2005 - 3:00 PM Central Daylight Time

     How:    Live via phone by dialing 800-936-4602. Code: Natural Gas
             Services.  Participants to the conference call should call in at
             least 5 minutes prior to the start time.

Steve Taylor, President and CEO of Natural Gas Services Group, Inc. will be leading the call and discussing second quarter and six months financial results. Mr. Taylor and Wallace Sparkman, Chairman, will discuss the status of the industry and the role of the Company within the industry; the status of existing and new natural gas compressor leases and offer an outlook on the balance of fiscal year 2005.

About Natural Gas Services Group, Inc.

NGS is a Midland, TX based company that manufactures, fabricates, sells, leases and services natural gas compression equipment used in the production of natural gas wells. The Company also manufactures and sells flare and flare ignition systems for gas processing and production facilities. NGS has extensive operations in the major gas-producing basins of Texas, New Mexico, Michigan and Oklahoma.

This release contains forward-looking statements subject to various risks and uncertainties that could cause the company's future plans, objectives and performance to differ materially from those in the forward-looking statements. Forward-looking statements can be identified by the use of forward-looking terminology such as "may," "will," "expect," "intend," "subject to," "anticipate, "should," "estimate," "continue," "future," "appears," "prospective," "designed," or other variations thereof or comparable terminology. Factors that could cause or contribute to such differences could include, but are not limited to, those relating to the company's expansion strategy, changes in demand for the company's products because of changes in oil and natural gas prices, competition among the various providers of compression services and products, changes in safety, health and environmental regulations pertaining to the production and transportation of natural gas, changes in economic or political conditions in the markets in which the company operates, introduction of competing technologies by other companies, operating risks, outstanding indebtedness, changes in interest rates, expansion and other activities of competitors, changes in federal or state environmental laws and the administration of such laws, and the general condition of the economy and its effect on the securities market. While we believe our forward-looking statements are based upon reasonable assumptions, these are factors that are difficult to predict and that are influenced by economic and other conditions beyond our control. Investors are directed to consider such risks and other uncertainties discussed in documents filed by the company with the Securities and Exchange Commission.

  For more information visit the Company's website at http://www.ngsgi.com .

Please contact Jim Drewitz, Creative Options Communications, 972-355-6070 with any questions regarding the conference call.

     For More Information, Contact:
     Steve Taylor, President & CEO
     800-580-1828

     Jim Drewitz, Investor Relations
     972-355-6070

SOURCE  Natural Gas Services Group, Inc.
    -0-                             07/25/2005
    /CONTACT:  Steve Taylor, President & CEO of Natural Gas Services Group,
Inc., +1-800-580-1828; or Jim Drewitz, Investor Relations, +1-972-355-6070,
for Natural Gas Services Group, Inc./
    /Web site:  http://www.ngsgi.com /
    (NGS)

CO:  Natural Gas Services Group, Inc.
ST:  Texas
IN:  OIL
SU:  CCA MAV

KS-CD
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6696 07/25/2005 09:15 EDT http://www.prnewswire.com