Jon A. Marshall

Mr. Marshall retired as President and Chief Operating Officer of Transocean Ltd., a role in which he served in 2007 and 2008. Before that, Mr. Marshall served as the Chief Executive Officer and President of GlobalSantaFe Corporation from 2003 to 2007, when it merged with Transocean. Mr. Marshall also served on the boards of directors of those companies. Mr. Marshall has served as a director of Noble Corporation plc since 2009, where he currently serves as chairman of its HSE & Engineering Committee and as a member of its Audit and Finance Committees and has served as a director of Cobalt International Energy, Inc. since 2010, where he currently serves as chairman of its Compensation Committee.