Board of Directors

Michael J. Hennigan
Chairman, President and Chief Executive Officer
MPLX GP LLC

Christine S. Breves
Retired Executive Vice President, Business Transformation for United States Steel Corporation

Christopher A. Helms
President and Chief Executive Officer
US Shale Management Company

Maryann T. Mannen
Executive Vice President and Chief Financial Officer
Marathon Petroleum Corporation

Garry L. Peiffer
Retired President
MPLX GP LLC

John J. Quaid
Executive Vice President and Chief Financial Officer
MPLX GP LLC

Dan D. Sandman
Retired Vice Chairman and Chief Legal and Administrative Officer
United States Steel Corporation

Frank M. Semple
Retired Chairman, President and Chief Executive Officer
MarkWest Energy Partners, L.P.

J. Michael Stice
Professor
University of Oklahoma

John P. Surma
Non-Executive Chairman
Marathon Petroleum Corporation

For more information, please see Board Committees