Mr. Scott Sheffield

Director (Non-Executive)

Mr. Sheffield has more than 50 years of experience in the energy industry, including building a company into a top tier exploration and production company that was acquired by Exxon Mobil Corporation in a transaction that closed in May 2024. From 2019 until December 31, 2023, he served as a director and Chief Executive Officer of Pioneer Natural Resources Company (“Pioneer”), a large publicly traded domestic upstream oil and gas company. He retired on December 31, 2023, as CEO and remained as a director until May 2024. Mr. Sheffield served as the founding Chief Executive Officer of Pioneer from August 1997 until his retirement in December 2016, and he also served as board chair from 1999 until 2019 when he returned as the CEO. Mr. Sheffield was the CEO of Parker and Parsley Petroleum Company, a predecessor company of Pioneer, from 1985 until it merged with MESA, Inc. to form Pioneer in 1997. Mr. Sheffield joined Parker and Parsley as a petroleum engineer in 1979, was promoted to Vice President of Engineering in 1981, was elected President and a director in 1985, and became board chair and Chief Executive Officer in 1989. Mr. Sheffield served as a director of Santos Limited, an Australian exploration and production company, from 2014 to 2017. He previously served as a director from 1996 to 2004 on the board of Evergreen Resources, Inc., an independent natural gas energy company.

Mr. Sheffield holds a Bachelor of Science in Petroleum Engineering from the University of Texas. He has also served on various industry and education-related boards, including the National Petroleum Council, America’s Natural Gas Alliance, and the Maguire Energy Institute of the Southern Methodist University Cox School of Business. Mr. Sheffield is also a 2013 inductee to the Permian Basin Petroleum Museum Hall of Fame.