David M. Demshur
Mr. Demshur has served as our Chief Executive Officer and Supervisory Board member since our initial public offering in 1995 and Chairman of our Supervisory Board since May 2001. Since joining our Company in 1979, Mr. Demshur has held various operating positions, including Manager of Geological Sciences from 1983 to 1987, Vice President of Europe, Africa and the Middle East from 1989 to 1991, Senior Vice President of Petroleum Services from 1991 to 1994 and Chief Executive Officer and President from 1994 to the present time. Mr. Demshur's extensive background with the Company and the diversity of experiences gained while in these leadership roles positions him to be an effective leader of our Company. Mr. Demshur is a member of the Society of Petroleum Engineers, the American Association of Petroleum Geologists, Petroleum Exploration Society of Great Britain and the Society of Core Analysts Section of the Society of Professional Well Loggers Association.

Richard L. Bergmark
Mr. Bergmark has served as a Supervisory Director since our initial public offering in 1995. Mr. Bergmark also presently serves as our Executive Vice President and Chief Financial Officer. Mr. Bergmark joined Western Atlas International, Inc. as Treasurer in 1987. From 1987 to 1994, our Company was operated as a division of Western Atlas. In 1991, Mr. Bergmark became the Area Manager for Finance and Administration for Europe, Africa and the Middle East operations of Western Geophysical, a division of Western Atlas. From our separation with Western Atlas in 1994 until 1999, he served as our Chief Financial Officer and Treasurer and in 1999 he was appointed Executive Vice President. He has substantial knowledge of the industry based upon his 25+ years with the Company and its predecessors and has extensive knowledge about the history of the Company, both of which are important for planning and management purposes. Furthermore, his understanding of the financial matters relating to the Company and our industry are of crucial importance to the Company. Mr. Bergmark, along with our Chief Executive Officer, has developed important contacts with others in the industry and has an excellent relationship with our shareholders.

Charles Dunlap
Mr. Dunlap is Chief Executive Officer and President of TransMontaigne, a terminaling and transportation company, and Chief Executive Officer of TransMontaigne Partners L.P., a publicly-traded master limited partnership, both based in Denver, Colorado. Mr. Dunlap served as Chief Executive Officer and President of Pasadena Refining System, Inc., based in Houston, Texas from January 2005 to December 2008. From 2000 to 2004, Mr. Dunlap served as one of the founding partners of Strategic Advisors, L.L.C., a management consulting firm based in Baltimore, Maryland. Prior to that time, Mr. Dunlap served in various senior management and executive positions at various oil and gas companies including Crown Central Petroleum Corporation, Pacific Resources Inc., ARCO Petroleum Products Company and Clark Oil & Refining Corporation. Mr. Dunlap is a graduate of Rockhurst University, holds a Juris Doctor degree from Saint Louis University Law School and is a graduate of the Harvard Business School Advanced Management Program. Mr. Dunlap's extensive management experience in the oil and gas sector as well his diverse educational background will allow him to provide valuable insight on management and strategic issues.

Lucia van Geuns
Ms. van Geuns is Senior Research Fellow at the Clingendael International Energy Programme (CIEP) and has held a position with CIEP since 2003. Her research focuses around the geopolitics and macro-economics of international energy markets and energy transition. She started her career in 1980 as a petroleum geologist at the Shell Research Laboratories for Royal Dutch Shell plc. in Rijswijk after which she served for Brunei Shell Petroleum from 1983 to1986. In her 22 years with Royal Dutch Shell she has held many different technical and management positions, including manager of Geological Services in Rijswijk from 1989 to 1993 and leader of various exploration and production projects during the 1990s, including the large Camisea gas/liquid project in Peru and field development planning in the Niger delta. She has a strong background in geoscience, petroleum engineering and economics & planning. In her present role at Clingendael, she is a frequent speaker on energy market issues for various public and private stakeholders. Ms. van Geuns holds an MSc in Earth Sciences from the University of Leiden and is a member of various professional associations. Ms. van Geuns' background in geology, her extensive technical experience in international petroleum projects and her knowledge of petroleum economics provide a set of skills complementary to the other members of the Supervisory Board.

Michael C. Kearney
Mr. Kearney is currently Chairman of our Audit Committee and has served as a Supervisory Director since 2004. Mr. Kearney has served as President and Chief Executive Officer of DeepFlex Inc. since September 2009 and had served as the Chief Financial Officer of DeepFlex Inc. from January 2008 until September 2009. He served as Executive Vice President and Chief Financial Officer of Tesco Corporation, a Canadian based oil service company from October 2004 to January 2007. From 1998 until 2004, Mr. Kearney served as the Chief Financial Officer and Vice President - Administration of Hydril Company, a manufacturer of products for petroleum drilling and production. Mr. Kearney brings to the Company significant accounting expertise as a result of his work experience and educational training. His executive level experience as Chief Financial Officer at publicly traded companies and direct knowledge and experience of operating and maintaining internal controls over financial reporting benefits the Company given Mr. Kearney's former positions as a certifying officer. Mr. Kearney has a Master of Science degree in Accountancy and a BBA degree in Finance.

Margaret Ann van Kempen
Ms. van Kempen has served as a Supervisory Director since 2012. She has been the owner and managing partner of Van Kempen Public Relations & Public Affairs since 1997. She has extensive experience in strategic corporate communications and investor relations, with a focus on reputation and risk management. She has provided litigation PR and communications advice on a wide variety of issues in high profile cases in and outside the Netherlands. Her clients cover a range of sectors including telecommunications, energy, ICT, professional services and fashion industry. From 1988 to 1995 she was Director European Affairs of Financial Times Television. Before that she worked in government and semi-government organizations including the Ministry of Economic Affairs. Since her election to the Supervisory Board, Ms. van Kempen has served as a member of our Nominating and Governance Committee. Ms. van Kempen's background in corporate communications and knowledge of strategic investor relations, including her knowledge of such matters in Europe, allow her to provide unique insight to the Company particularly in light of our dual listing on the NYSE Euronext in Amsterdam.

D. John Ogren
Mr. Ogren is currently Chairman of our Compensation Committee and has served as a Supervisory Director since 2000. Mr. Ogren also became a member of the Audit Committee, effective March 1, 2011. Mr. Ogren served as the President of Production Operators, Inc. from 1994 until 1999. Production Operators was listed on the Nasdaq Stock Market prior to its acquisition by Camco International in 1997 and Schlumberger's acquisition of Camco International in 1998. From 1989 until 1991, Mr. Ogren served as Senior Vice President of Conoco Inc. and from 1992 until 1994, as Senior Vice President of E.I. duPont. Mr. Ogren served as a director of the John Wood Group PLC until May 2011 and as Chairman of Deepflex Inc. until August 2011. Previously, he served as nonexecutive Chairman of WellDynamics, a Halliburton/Shell joint venture. He is a member of the Society of Petroleum Engineers. The combination of Mr. Ogren's experiences within the oilfield service sector in addition to his senior level work experience within an oil and gas operating company provide valuable insight for the Company. Having served in senior operating and executive management positions as well as in the role of Chairman of other companies during his career, he has the background to deal with the many facets of planning as well as issues related to compensation that are handled in his role as Chairman of the Compensation Committee.

Jan Willem Sodderland
Mr. Sodderland was elected to the Board of Supervisory Directors in 2011 and prior to that he had served for five years as a Managing Director of the Company's Managing Director, Core Laboratories International B.V., and as a managing director of other Dutch affiliates. Mr. Sodderland serves on the board of European subsidiaries of a number of international companies. From 1974 until 2006, Mr. Sodderland was an attorney and partner of NautaDutilh and was stationed in Rotterdam, Brussels and Amsterdam. In his practice Mr. Sodderland has built up considerable experience in assisting and advising companies in complicated takeovers, mergers and joint ventures. Mr. Sodderland has long had a close relationship with Japan and China and has published a number of articles about investment possibilities in Asia. He is also the past Chairman of the Pacific Rim Advisory Council, an association of some thirty independent law firms in various parts of the world. His legal practice and service on boards has given him broad, diversified exposure to best practices for corporate governance.