Scott D. Sheffield is an energy industry leader who played significant roles in the American shale revolution and lifting of the U.S. crude oil export ban. He currently serves as CEO of Pioneer Natural Resources, a company he helped found in 1997 and grew into what is today the second-largest crude producer in Texas and the largest producer in the Permian Basin.

The son of an ARCO executive, Mr. Sheffield attended high school in Tehran, Iran. After graduating from the University of Texas with a bachelor of science degree in petroleum engineering, he began his career as a reservoir engineer with Amoco Production Co. Mr. Sheffield became the fifth employee of Parker & Parsley Petroleum Co. in Midland, Texas in 1979; CEO by 1985; and chairman in 1991.

Under his leadership, Parker & Parsley merged with MESA, Inc. in 1997 to form Pioneer Natural Resources Co. Mr. Sheffield became the company’s founding CEO and assumed the position of chairman of the board in August 1999. He retired from the company in 2016, but returned as president and CEO in 2019 and continues to serve on the board.

Mr. Sheffield also serves as a director of the Williams Companies, Inc., a provider of large-scale infrastructure for natural gas and natural gas products; on the advisory board of the Center for Global Energy Policy at Columbia University; and on the Energy Council of CSL Capital Management, LLC, a private equity firm.