Mr. Yearwood has served as a director since June 2007. Mr. Yearwood currently serves on the Board of Directors of Nabors Industries, Ltd., Barra Energia, Sheridan Production Partners, Premium Oilfield Services, and Foro Energy. Until recently, he served as the Chief Executive Officer, President and Chief Operating Officer of Smith International, Inc. Mr. Yearwood was first elected to Smith’s Board of Directors in 2006 and remained on the board until he successfully negotiated and completed the sale of Smith to Schlumberger Ltd. in August 2010. Before joining Smith, Mr. Yearwood spent 27 years with Schlumberger in numerous operations management and staff positions throughout Latin America, Europe, North Africa and North America, including as President and in financial director positions. Mr. Yearwood received a Bachelor of Science Honors Degree in Geology and the Environment from Oxford Brookes University in England.