Mr. G. Larry Lawrence has been the Chief Financial Officer and Vice President of Finance at Natural Gas Services Group Inc. since July 1, 2011 and as its Principal Accounting Officer, Corporate Secretary and Treasurer since January 1, 2011. Mr. Lawrence served as a Manager of Accounting of Natural Gas Services Group Inc. since January 1, 2011 and its Controller since September 2010. He served as Controller of ARCO Permian from 1993 to May 2000. From 1973 to May 2000, he was employed by Atlantic Richfield Company (ARCO). He served as a Controller of Pure Resources, a wholly owned subsidiary of Unocal Corporation from May 2004 to April 2006. He served as a Practice Manager of Parson Group, LLC from June 2000 to May 2004. From September 2006 to August 2009, he served as the Chief Financial Officer of Lynx Operating Company. He has been a Director at Legacy Reserves GP LLC, the General Partner of LEGACY RESERVES LP since May 1, 2006. From June 2006 to August 2010, he was self employed as a management consultant doing business as Crescent Consulting. Mr. Lawrence holds a Bachelor of Arts in Accounting, with honors from Dillard University.