Scott Sheffield - Pioneer Natural President, Chief Executive Officer, Director

Mr. Scott D. Sheffield is President, Chief Executive Officer, Director of Pioneer Natural Resources. Mr. Sheffield Mr. Sheffield was appointed the Company President and Chief Executive Officer in February 2019. He had served as Chairman of the Board of the Company from 1999 through February 2019. Previously, he had served as Chief Executive Officer of the Company from 1997 through December 31, 2016, and then as the Executive Chairman until December 31, 2017, when he retired as an executive and officer of the Company. Mr. Sheffield was the Chairman of the Board of Directors and Chief Executive Officer of Parker Parsley Petroleum Company, a predecessor of the Company, from January 1989 until Pioneer was formed in August 1997. Mr. Sheffield joined Parker Parsley as a petroleum engineer in 1979, was promoted to Vice President Engineering in September 1981, was elected President and a Director in April 1985, and became Parker Parsley Chairman of the Board and Chief Executive Officer on January 19, 1989. Before joining Parker Parsley, Mr. Sheffield was employed as a production and reservoir engineer for Amoco Production Company. He had also served as Chief Executive Officer and director from June 2007, and as Chairman of the Board from May 2008, of the general partner of Pioneer Southwest through December 2013. Mr. Sheffield severance agreement provides that his failure to be reelected constitutes good reason under his severance agreement whether or not his resignation is accepted by the Board, which would entitle him to terminate his employment and receive the benefits described in the section below entitled Executive Compensation Tables Potential Payments upon Termination or Change in Control. since 2021.