Rhys J. Best

Chairman of the Board of MRC Global Inc., Former Chairman, President and CEO of Lone Star Technologies, Inc.
Director since 2007

Deborah G. Adams

Former Senior Vice President of Phillips 66
Director since 2017

Leonard M. Anthony

Former President and CEO of WCI Steel, Inc. and Former Chief Financial Officer of Dresser-Rand Group, Inc.
Director since 2008

Henry Cornell

Founder and Senior Partner of Cornell Capital LLC
Director from 2007-2015 and since 2018

Barbara J. Duganier

Former Global Chief Strategy Officer of Accenture and Former Global Chief Financial Officer of Andersen Worldwide
Director since 2015

Craig Ketchum

Former MRC Global Chairman of the Board, President and CEO
Director since 2007

Andrew R. Lane

MRC Global President and Chief Executive Officer and former Halliburton Chief Operating Officer
Director since 2008

Dr. Cornelis A. Linse

Chairman of the Netherlands Commission for Environmental Impact Assessment and former Shell executive
Director since 2010

John A. Perkins

Former CEO of Truflo International plc
Director since 2009

H. B. Wehrle, III

Former MRC Global Chairman of the Board, President and CEO
Director since 2007

Robert L. Wood

Former Chairman, President and CEO of Chemtura Corporation
Director since 2015