Board of Directors

Duane C. Radtke
Chairman of the Board

Mr. Radtke has served as a director since June 2008 and became Chairman of the Board in August 2009. Mr. Radtke has over 40 years of experience in energy executive management, engineering and business development. From 2001 until retiring, Mr. Radtke served as President and Chief Executive Officer of Dominion Exploration and Production, a subsidiary of Dominion Resources, Inc., and Executive Vice President of Dominion Resources, Inc. Previously, Mr. Radtke served as President of Devon International. Mr. Radtke is currently a director of Devon Energy Corporation, a public company, and a member of the boards of the Offshore Energy Center and the Palmer Drug Abuse Program and President and Chief Executive Officer of Valiant Exploration LLC, which is engaged in investments in the oil and gas industry. Mr. Radtke is a former Chairman of the American Exploration and Production Council and former Chairman of Spindletop Charities. Mr. Radtke earned a Bachelor of Science in Mining Engineering from the University of Wisconsin.

David J. Sambrooks, Sabine Oil & Gas LLC
Director

Mr. Sambrooks has served as a director since May 2007. Mr. Sambrooks has extensive experience in executive management, engineering and business development. Prior to joining the company in early 2007, he served as Vice President and General Manager of Devon Energy Corporation's Southern Division, and prior to that their International Division. Mr. Sambrooks also held other senior positions with Santa Fe Energy Corporation. Mr. Sambrooks received a Bachelor of Science degree in Mechanical Engineering from the University of Texas at Austin and a Master of Business Administration from the Executive Program at the University of Houston. Mr. Sambrooks is on the board and executive committee of Communities in Schools.

Michael G. France, First Reserve Corporation
Director

Mr. France has served as a director since December 2007. Mr. France is a Managing Director of First Reserve which he joined in 2007. His responsibilities range from deal origination and structuring to due diligence, execution and monitoring, with particular focus on the reserves and midstream sectors. Prior to joining First Reserve, Mr. France was Vice President in the Natural Resources Group, Investment Banking Division, at Lehman Brothers. From 1999 until 2001, Mr. France was a consultant at Deloitte & Touche. Mr. France holds a Bachelor of Business Administration degree in Finance from The University of Texas and a Master of Business Administration from Jones Graduate School of Management at Rice University. Mr. France also serves as a director on the boards of Cobalt International Energy, Inc. and Crestwood Midstream Partners, both of which are public companies.

Alex T. Krueger, First Reserve Corporation
Director

Mr. Krueger has served as a director since February 2011. Mr. Krueger is President of First Reserve which he joined in 1999 and is responsible for the development and management of the buyout investment team. Mr. Krueger’s responsibilities include investment origination, structuring, execution, monitoring and exit strategy. He is involved in investment activities in all areas of the worldwide energy industry, with particular expertise in the natural resources sector. Prior to joining First Reserve, Mr. Krueger worked in the Energy group of Donaldson, Lufkin & Jenrette in Houston. Mr. Krueger holds two B.S. degrees from the University of Pennsylvania, one in Chemical Engineering and one in Finance and Statistics from the Wharton School. Mr. Krueger also serves as a director of Whitehaven Coal Limited, an Australian public company.

Brooks Shughart, First Reserve Corporation
Director

Mr. Shughart has served as a director since December 2012. Mr. Shughart is a Director of First Reserve which he joined in 2012. His responsibilities range from deal origination and structuring to due diligence, execution and monitoring, with particular focus on the reserves sector. Prior to joining First Reserve, Mr. Shughart was a Director in the Mergers and Acquisitions Group for Credit Suisse. Prior to Credit Suisse, he held positions in the energy groups of Lazard Freres and Donaldson, Lufkin & Jenrette/CS First Boston. Mr. Shughart holds a Bachelor of Business Administration degree in Finance from The University of Texas.

John Yearwood
Director

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.