Williams appoints three new independent directors to board
Stephen W. Bergstrom is a director on the board of American Midstream Partners. He served as president and chief executive officer of the general partner of American Midstream and as executive chairman of the board of directors of the general partner from May 2013 to December 2015.
Mr. Bergstrom acted as an exclusive consultant to ArcLight from October 2003 to December 2015, assisting ArcLight in connection with its energy investments.
Prior to his consultancy with ArcLight, Mr. Bergstrom worked from 1986 to 2002 for Natural Gas Clearinghouse, which became Dynegy Inc. He acted in various capacities at Dynegy, ultimately serving as President and Chief Operating Officer.
Mr. Bergstrom earned a Bachelor of Science in Industrial Administration from Iowa State University.
Scott D. Sheffield is chairman and chief executive officer of Pioneer Natural Resources Company. Mr. Sheffield has served as chief executive officer since August 1997 and assumed the position of chairman of the board of directors in August 1999.
He was president of the company from August 1997 to November 2004. Sheffield was the chairman of the board of directors and chief executive officer of Parker & Parsley, a predecessor company of Pioneer Natural Resources Company, from January 1989 until 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’s chairman of the board and chief executive officer in January 1989.
He also serves as a director of Santos Limited, an Australian exploration and production company.
Mr. Sheffield is a distinguished graduate of The University of Texas with a Bachelor of Science degree in Petroleum Engineering.
William H. Spence is chairman, president and chief executive officer of PPL Corporation, one of the largest companies in the U.S. utility sector.
Prior to his appointment as chairman in April 2012, Mr. Spence was named chief executive officer and appointed to the board of directors of PPL Corporation in November 2011.
Previously, he was named president and chief operating officer of PPL Corporation in July 2011, and served as executive vice president and chief operating officer since June of 2006.
Prior to joining PPL, Mr. Spence had 19 years of service with Pepco Holdings, Inc. and its heritage companies, Delmarva Power and Conectiv, where he held a number of senior management positions. He currently serves on the board of the Electric Power Research Institute.
He also serves as a member of the executive committee of the Edison Electric Institute (EEI) and as co-chairman of EEI’s CEO Policy Committee on Reliability and Business Continuity.
Mr. Spence earned a bachelor’s degree in petroleum and natural gas engineering from The Pennsylvania State University and a master’s degree in business administration from Bentley College.
He is also a graduate of the Executive Development Program at the University of Pennsylvania’s Wharton School and the Nuclear Technology Program of the Massachusetts Institute of Technology.