Eric Mattson - NOV Independent Director

Mr. Eric L. Mattson is Independent Director of National Oilwell Varco Inc. Mr. Mattson served as a Director of Varco from January 1994 until its merger with the Company on March 11, 2005. Mr. Mattson is currently an investor in and serves as the EVPFinance of SES Holdings, LLC, a privately held oil service company located in Gainesville, Texas, and also serves as EVPFinance of Select Energy Services, Inc., an affiliate of SES Holdings, LLC, and which recently filed its Form S1 to go public. Prior to that, Mr. Mattson served as Senior Vice President and Chief Financial Officer of VeriCenter, Inc., a private provider of managed hosting services, since 2003, until its acquisition in August 2007. From November 2002 until October 2003, Mr. Mattson worked as an independent consultant. Mr. Mattson was the Chief Financial Officer of Netrail, Inc., a private Internet backbone and broadband service provider, from September 1999 until November 2002. From July 1993 until May 1999, Mr. Mattson served as Senior Vice President and Chief Financial Officer of Baker Hughes Incorporated, a provider of products and services to the oil, gas and process industries. Mr. Mattson serves as a director of Rex Energy Corporationrationration, a company engaged in the acquisition, production, exploration and development of oil and gas. Mr. Mattson has an MBA degree and 43 years of financial experience, including 24 years as a chief financial officer of four different companies. Mr. Mattson has extensive experience in the oil service business, having worked in that industry for over 34 years. He also has extensive mergers and acquisitions experience of over 34 years on a global basis since 2005.