Mark began his career as a landman for Mobil Oil Corporation (Rocky Mountain Division), followed by Texas Oil and Gas Company (Mid-Continent Division). He held positions as a Land Manager for Berry Petroleum, F.C.D and American Petrofina – FINA Oil and Chemical Company. Mark was a Co-owner of Medina-Pierce Oil and Gas Company, an independent oil and gas exploration and operating company and prior Co-owner of HISCO, Incorporated, a manufacturer of professional grade digging and striking tools. Mark is a 1975 Graduate of the University of Oklahoma, with a Bachelor of Business Administration in Petroleum Land Management. Mark is a qualified land witness at the Oklahoma Corporation Commission. He is also a Member of American Association of Professional Landmen, Certified Professional Landman (#84572), Oklahoma City Association of Professional Landmen, and the Oklahoma City Geological Society.
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