Mr. Payne has served as Chairman and Chief Executive Officer of Shona Energy Company, Inc. since December 2006 and its predecessor Shona Energy Company, LLC formed in January 2005. Mr. Payne served as Chairman, President and Chief Executive Officer of Nuevo Energy Company from October 2001 until its merger with Plains Exploration and Production Company in May 2004. Mr. Payne served as Chairman and Chief Executive Officer of Santa Fe Energy from 1990 until May 1999, when Santa Fe merged with Snyder Oil Corporation, which also was engaged in the production of oil and gas. Following the merger, he was Chief Executive Officer and then Chief Executive Officer and Chairman of the merged company, Santa Fe Snyder Corporation. Santa Fe Snyder merged with Devon Energy Corporation, which also is engaged in the production of oil and gas, in August 2000, and Mr. Payne was Vice Chairman and a director of Devon through January 2001. Mr. Payne is also a director of Nabors Industries Ltd. and Global Industries, Ltd.