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Mr. Pinkston joined the Company in December 1981. He had served as Corporate Budget Director and Assistant Controller prior to being appointed as Controller in February 1985. He has been Treasurer since December 1986 and was elected to the position of Vice President and Chief Financial Officer in May 1989. In 2003, he was promoted to Executive Vice President and effective August 1, 2003, he assumed the office of President. In February of 2004, he was elected to the position of Chief Operating Officer. Effective April 1, 2005, with the retirement of John Nikkel, Mr. Pinkston assumed the office of Chief Executive Officer. He holds a Bachelor of Science Degree in Accounting from East Central University of Oklahoma and is a Certified Public Accountant. | 