
	Mr. Sterling H. McDonald has been the Chief Financial Officer of Evolution Petroleum Corp. (Alternate Name: Natural Gas Systems Inc.) since November 2003 and has been its Vice President since May 2004. Mr. McDonald has been Treasurer of Evolution Petroleum Corp. since May 24, 2004 and has been its Principal Accounting Officer since December 5, 2011. Mr. McDonald serves as Chief Financial Officer and Treasurer of NGS Technologies, Inc. From 1997 to 1999, he served as Chief Financial Officer for PetroAmerican Services, a subsidiary of an integrated NYSE-traded oil and gas company. Previously, he served as Chief Financial Officer of PetroStar Energy, an exploration and production company, and Treasurer of Reading and Bates Corporation, a NYSE-traded international offshore drilling services, exploration and production company. Mr. McDonald is responsible for administrative functions of Evolution Petroleum Corp. From 1999 to 2003, Mr. McDonald served as an Independent Consultant and Interim Chief Financial Officer to various companies. Mr. McDonald holds an MBA and a BS in Finance from the University of Tulsa.
