Scott Sheffield is chair and chief executive officer of Pioneer Natural Resources Company, which is listed on the New York Stock Exchange and included in the S&P 500 Index. Mr Sheffield has been chief executive since 1997 and chair since 1999. He serves on various industry and education-related boards, including the National Petroleum Council and the Maguire Energy Institute of the SMU Cox School of Business. Mr Sheffield is also a 2013 inductee into the Permian Basin Petroleum Museum Hall of Fame.