J Robinson West
Former Chairman, US Institute of Peace; former chairman and founder of PFC Energy (1984-2013)
William P Utt
Chairman, President and Chief Executive Officer, KBR, Inc.
Robert B Catell
Former chairman of National Grid
Rex Tillerson
former Secretary of State. former Chairman and CEO of Exxon Mobil. former Boy Scouts president.
David J O'Reilly
Former Chairman & CEO of Chevron