Pioneer Board of Directors

Dean A. Burkhardt, Chairman of the Board
Committees: Mr. Burkhardt has served as a director since October 2001. He serves as chairman of the Nominating and Corporate Governance Committee and a member of the Audit Committee and Compensation Committee. Mr. Burkhardt has 30 years of experience in energy services. He co-founded and operated Cheyenne Service Inc., Applied Petroleum Software Inc. and was president and CEO of Tescorp Energy Services. Mr. Burkhardt is an investor and consultant in the energy service business.
Wm. Stacy Locke
Mr. Locke has served as an officer and director since May 1995. He has been president and chief executive officer since December 2003. He previously served as president and chief financial officer from August 2000 to December 2003, as president and chief operating officer from November 1998 to August 2000 and as president and chief executive officer from May 1995 to November 1998. Prior to joining Pioneer, Mr. Locke was in investment banking for eight years and an exploration geologist for seven years.
C. John Thompson
Mr. Thompson has served as a director since May 2001. Mr. Thompson serves as a member of the Audit Committee, Compensation Committee, and Nominating and Corporate Governance Committee . Mr. Thompson currently serves as a principal of Vector Energy Capital L.L.C., a company he co-founded in 2005 to provide capital advisory services to upstream oil and gas producers. Mr. Thompson also serves as chairman and chief executive officer of Ventana Capital Advisors Inc., a capital advisory company he founded in June 2004. His other experience includes being vice president of Constellation Energy and a consultant to the oil and gas industry. Mr. Thompson was vice president and co-manager of Enron Energy Capital Resources from February 2000 to December 2001.
John Michael Rauh
Mr. Rauh was appointed as director in 2008. He serves as chairman of the Audit Committee and as a member of the Nominating and Corporate Governance Committee and Compensation Committee. Mr. Rauh served as vice president and corporate controller of Kerr-McGee Corporation from 2001 until his retirement in 2006. There he was responsible for worldwide accounting, tax and Sarbanes-Oxley 404 compliance. He also served as a founding director of Kerr-McGee's chemical operations spin-off. Mr. Rauh joined Kerr-McGee in 1981 and served in varying capacities, including treasurer, controller and assistant controller. Prior to joining Kerr-McGee, he was an auditor with Arthur Young & Company, which merged with Ernst & Whinney in 1989 to form Ernst & Young. Mr. Rauh is a Certified Public Accountant.
Scott D. Urban
Mr. Urban was appointed as director in 2008. He serves as chairman of the Compensation Committee and as a member of the Nominating and Governance Committee and Audit Committee. Mr. Urban is a partner in Edgewater Energy Partners, a consulting firm focused on the oil and gas exploration and production industry and assisting private equity firms with upstream investments. He served as Upstream group vice president for BP PLC from 2004 to 2005 and as North Sea Operations group vice president from 2000 to 2004. Prior to joining BP, Mr. Urban held a variety of management positions with Amoco Corporation, including Worldwide Exploration group vice president and Upstream business unit manager, China. Mr. Urban currently serves on the board of directors of Noble Energy Inc. and has served as a board member of the UK Offshore Operators Association, the Business Council for International Understanding, and the Netherlands Oil and Gas Exploration and Production Association.