Natural Gas Services Group Inc.

Paul D. Hensley, 56, was appointed as a Director of Natural Gas Services Group in January 2005 and was first elected as a Director at the annual meeting of shareholders held in June 2005. Mr. Hensley currently serves as Senior Vice President - Technology of Natural Gas Services Group. He is the founder of and served as President and as a Director of our former subsidiary, Screw Compression Systems, Inc., from its inception in 1997 until it was merged into Natural Gas Services Group in June 2007. Mr. Hensley has over 30 years of industry experience.

James R. Hazlett, 52, has served as Vice President - Technical Services since June 2005. He also served as Vice President of Sales of Screw Compression Systems, Inc. from 1997 until June 2007 when Screw Compression Systems, Inc. was merged into Natural Gas Services Group. After the merger in June 2007, Mr. Hazlett continues to remain employed by Natural Gas Services Group as Vice President - Technical Services. Mr. Hazlett holds an Industrial Engineering degree from Texas A&M University and has over 27 years of industry experience

William F. Hughes Jr., 56, has served as a Director since December 2003. Mr. Hughes has over 30 years experience in the engineering and construction industry as a Registered Civil Engineer and licensed building contractor. From 1974 to 1979, he served as an officer in the United States Air Force. From 1979 to 1986, he was a project design engineer for Cushman & Associates. From 1986 to 1996, he served as a Project Manager on a variety of public works and industrial construction projects. 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 United States Air Force Academy and a Master of Science in Engineering from the University of California at Los Angeles.

Mr. Baker presently serves as a consultant to Halliburton Company and previously served as President, Chairman and Chief Executive Officer of Halliburton Company's Energy Services Group, Houston, Texas from 1991 until his retirement in 1995. Mr. Baker joined Halliburton Services in 1954 after graduating with a degree in petroleum engineering from Marietta College in Ohio. Mr. Baker has served Halliburton Services as Senior Vice President for U.S. Operations, Senior Vice President for International Operations and as President of the Vann Systems Division of Halliburton Company. Mr. Baker also served as a member of Halliburton's executive committee. Mr. Baker has served on the Boards of Noble Affiliates, Natural Gas and Oil, Crestar Energy of Canada and the Mid-Continent Oil and Gas Association. He is Trustee Emeritus of Marietta College and is a registered professional engineer.

Charles G. Curtis has been one of our directors since April 2001. Since 1992, Mr. Curtis has been President and Chief Executive Officer of Curtis One, Inc. d/b/a Roll Stair, a manufacturer of aluminum and steel mobile stools and ladders. From 1988 to 1992, Mr. Curtis was 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.

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.