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Board of Directors

Greg Boyce

All Board Members

Mr. Boyce was appointed lead independent director of Marathon Oil's board of directors in 2019. He's been a board member since 2008.

Mr. Boyce retired as executive chairman of Peabody Energy Corporation (a private-sector coal company) in December 2015. He was named Chief Executive Officer Elect in 2005, and served as CEO from 2006 until 2015. Mr. Boyce was president of Peabody from 2003 to 2008 and was chief operating officer from 2003 to 2005. He was a director of Peabody since 2005, was appointed chairman in 2007 and executive chairman in 2015. From 2000 to 2003, Mr. Boyce served as chief executive officer-Energy of Rio Tinto plc (an international natural resource company). He served as president and CEO of Kennecott Energy Company from 1994 to 1999 and as president of Kennecott Minerals Company from 1993 to 1994, having served in positions of increasing responsibility with Kennecott since 1977.

Mr. Boyce serves on the board of directors of Newmont Goldcorp Corporation, a world-leading gold producer, and is a member of the U.S.-China Business Council. He is a past director on the board of Monsanto Company, and previously served on the board of the U.S.-China Business Council. Mr. Boyce is on the Advisory Council of the University of Arizona’s Lowell Institute of Mineral Resources and is a trustee of the Heard Museum in Phoenix, Arizona.

Mr. Boyce holds a B.S. in mining engineering from the University of Arizona and completed the Advanced Management Program from the Graduate School of Business at Harvard University.

Greg Boyce
Greg Boyce
Retired Executive Chairman
Peabody Energy Corporation