Board of Directors

Name	Title	Joined Board
Anne-Marie N. Ainsworth	Retired President and CEO, general partner of Oiltanking Partners, L.P. and Oiltanking Holding Americas, Inc.	2015
Richard J. Alario	Chairman of the Board of Kirby Corporation Retired Chairman, President and CEO of Key Energy Services, Inc.	2011
Tanya S. Beder	Chairman and CEO of SBCC Group ‘Strategy Building and Crisis Control’	2019
Barry E. Davis	Chairman and CEO of both EnLink Midstream GP and EnLink Midstream Manager, LLC	2015
Susan W. Dio	Retired Chairman and President of BP America, and CEO of BP Shipping	2023
David W. Grzebinski	Chief Executive Officer of Kirby Corporation	2014
Richard R. Stewart	Retired President and CEO of GE Aero Energy	2008
William M. Waterman	Retired President and CEO of Penn Maritime Inc.	2012
Shawn D. Williams	Chairman of the Board of Managers of Covia Holdings LLC	2021