In April 2005, Mark Berg joined Pioneer Natural Resources to serve as Executive Vice President & General Counsel. He was promoted to Executive Vice President, Corporate in January 2014, named Executive Vice President, Corporate/Operations in August 2015 and became Executive Vice President, Corporate/Vertically Integrated Operations in May 2017. Berg’s corporate responsibilities include oversight of Legal, Land, Regulatory Affairs, Government Affairs and Corporate Communications. In operations, he is responsible for Pioneer’s vertically integrated service companies: Pioneer Pumping Services, Premier Silica and Pioneer Well Services.
Berg began his career in 1983 with the Houston-based law firm of Vinson & Elkins L.L.P. and served as a partner from 1990 through 1997. He served as Executive Vice President, General Counsel and Secretary of American General Corporation, a Fortune 200 diversified financial services company, from 1997 through 2001. Subsequent to the sale of American General to American International Group, Berg was appointed Senior Vice President, General Counsel and Secretary of Hanover Compressor Company, a NYSE company specializing in natural gas compression and processing.
Berg received his Juris Doctor, with honors, from the University of Texas School of Law, and graduated magna cum laude and Phi Beta Kappa with a Bachelor of Arts in Public Policy from Tulane University.
He is a member of the State Bar of Texas. Berg also served as Chairman on the Board of Dallas CASA.