Bradley J. Bell has served as a director since September 2009. Mr. Bell most recently served as Executive Vice President and Chief Financial Officer of Nalco Holding Company, a position he held from November 2003 to December 2010. From April 1997 to July 2003, Mr. Bell served as Senior Vice President and Chief Financial Officer of Rohm and Haas Company, an international manufacturer of specialty chemicals and now a subsidiary of The Dow Chemical Company. Prior to that, Mr. Bell served as Vice President and Treasurer of both the Whirlpool Corporation (NYSE: WHR), from 1987 to 1997, and the Bundy Corporation, from 1980 to 1987. Mr. Bell is also a director, serves as chairman of the nominating and corporate governance committee and is a member of the compensation committee of IDEX Corporation (NYSE: IEX). Additionally, Mr. Bell is a director, serves as chairman of the compensation committee and is a member of the nominating and corporate governance committee of Compass Minerals International, Inc. (NYSE: CMP). Mr. Bell received a B.S. in finance with high honors from the University of Illinois and an M.B.A. with distinction from Harvard Business School.

Benoit Charpentier has served as a director since April 2010. Mr. Charpentier is employed by energy company Total S.A. and serves as a Senior Vice President, Investments at Total Energy Ventures, S.A., a venture capital affiliate of Total S.A., a position he has held since December 2009. From early 2005 to December 2008, Mr. Charpentier worked in the M&A Department of Finance Division with Total S.A., where he was in charge of a number of acquisitions of exploration and production companies. Previously, he held various positions with Total S.A., including positions relating to development of gas and power projects in South America and Europe. Mr. Charpentier earned an M.B.A. from the French business school École Supérieure des Sciences Economiques et Commerciales (ESSEC).

John A. Crum has served as a director since August 2012. Currently, Mr. Crum is the President and Chief Executive Officer of Midstates Petroleum Company, LLC. Prior to Midstates, Mr. Crum was the Co-Chief Operating Officer and President, North America, of Apache Corp. and previously served in various positions at the company including Executive Vice President and President of Apache Canada Ltd., and Executive Vice President and Managing Director, Apache North Sea, among others. Mr. Crum has also served in executive and management roles with Aquila Energy Resources Corporation, Pacific Enterprises Oil Company, Southland Royalty Company and Conoco. Mr. Crum received a B.S. in petroleum engineering from New Mexico Institute of Mining and Technology.

T. Kevin DeNicola has served as a director since December 2009. Mr. DeNicola most recently served as Chief Financial Officer of Kior, Inc. (NASDAQ: KIOR), a biofuels company, from November 2009 to January 2011. Prior to joining Kior, Mr. DeNicola served as Senior Vice President and Chief Financial Officer of KBR, Inc. (NYSE: KBR), a global engineering, construction and services company, from June 2008 until September 2009. From May 2002 to December 2007, he was Senior Vice President and Chief Financial Officer of Lyondell Chemical Company, a global manufacturer of basic chemicals. Mr. DeNicola also serves as a director of Georgia Gulf Corporation (NYSE: GGC) and Comerica Incorporated (NYSE: CMA). Mr. DeNicola earned a Masters degree in Chemical Engineering from the University of Virginia and a Masters of Business Administration from Rice University.

Christopher A. Helms has served as a director since August 2012. Mr. Helms is currently the Chief Executive Officer of US Shale Energy Advisors, LLC, a firm that specializes in providing advisory services to companies on issues arising out of the emerging North American shale developments. Previously, Mr. Helms was the Executive Vice President and Group Chief Executive Officer of NiSource, Inc., one of America’s premier regulated energy providers. In this role, Mr. Helms was responsible for a portfolio of growth projects tied to NiSource's 17,000-mile network of natural gas pipeline and storage assets. He was responsible for all commercial/regulatory, operations and project development functions related to  NiSource Gas Transmission and Storage , and instrumental in executing an aggressive growth strategy for NiSource's midstream gathering and processing businesses. Mr. Helm received a J.D. from Tulane University School of Law and a B.A. in political science and journalism from Southern Illinois University.

Samir Kaul has served as a director since June 2006. Mr. Kaul is a General Partner of Khosla Ventures, which he founded in January 2006. At Khosla Ventures, Mr. Kaul focuses on investments in renewable energy, clean technologies and life sciences. Previously, Mr. Kaul was a member of Flagship Ventures from June 2002 to January 2006, where he focused on investing in early-stage biotechnology companies. Additionally, Mr. Kaul has served as a director of Kior, Inc. (NASDAQ: KIOR), a biofuels company, including serving on its governance and compensation committees, since November 2007, and has also served as a director of several private companies. He earned a B.S. in biology from the University of Michigan, an M.S. in biochemistry from the University of Maryland and an M.B.A. from Harvard Business School.

James Kiggen has served as a director since October 2008. Mr. Kiggen is the President of the Riverside Company, a global private equity firm.  Mr Kiggen was previously a Senior Managing Director of The Blackstone Group from June 2008 to June 2012. Prior to joining Blackstone, Mr. Kiggen was a Senior Vice President at AllianceBernstein LP from March 2005 to June 2008, where he created and managed a research team focused on emerging sciences and technologies and oversaw all of the firm’s venture investments, including cleantech companies. Previously, Mr. Kiggen was a Managing Director at Donaldson, Lufkin & Jenrette/CSFB from April 1998 to February 2002, where he was Director of Technology Research and an equities analyst responsible for analyzing and valuing private and public technology companies. Mr. Kiggen began his investment career at Wellington Management Co. in 1992 and previous to that spent three years at McKinsey & Co. focusing on emerging technologies. Mr. Kiggen also serves as a director of The Weather Channel and Rive Technology. Mr. Kiggen earned a B.A. from Harvard College and an M.B.A. from Harvard Business School.

Andrew Perlman has served as a director since June 2009. Mr. Perlman serves as the Chief Executive Officer of GreatPoint Energy, which he co-founded in August 2004. Prior to co-founding GreatPoint Energy, Mr. Perlman was a co-founder of Coatue Corporation, a microelectronics company which was purchased by Advanced Micro Devices (NYSE: AMD) in June 2003, and served as its Chief Executive Officer from January 2001 to June 2003. In 1995, Mr. Perlman founded Cignal Global Communications, a developer of voice-over data network communications, and served as its President from 1995 until its sale in 2000. Mr. Perlman is also a director of GreatPoint Ventures, an investment firm focused on early stage commercialization of new technologies.

William Wiberg has served as a director since June 2006. Mr. Wiberg is a General Partner of Advanced Technology Ventures, a position he has held since August 2003. Mr. Wiberg is Advanced Technology Ventures’ lead partner in the clean technology sector. Previously, Mr. Wiberg was a General Partner of Orange Ventures from May 2002 to August 2003 and spent 19 years at Lucent Technologies, including serving as the President of Lucent Technology’s Cellular and PCS Wireless Networks division from 1997 to 2000. Mr. Wiberg is also a director and serves on the compensation committees of Great Point Energy, Inc., Rive Technology, Inc. and Oasys, Inc. Additionally, he has served as a director of several other private companies. Mr. Wiberg earned a B.S. from Cornell University, an M.S. from Stanford University and an M.B.A. from Columbia University.

William J. Roe has served as our President and Chief Executive Officer since September 2007 and as a director since November 2007. Prior to joining Coskata, Mr. Roe spent 29 years with Nalco Holding Company, the world’s largest provider of industrial water-treatment chemicals and process additives, where he served as the Chief Operating Officer from June 2001 to June 2007. Previously, Mr. Roe served as President of Nalco’s Asia Pacific Division from December 1998 to June 2001, where he was responsible for Nalco’s operations in China, Japan, Korea, Taiwan, Southeast Asia, India, Australia and New Zealand. Mr. Roe earned an M.S. in Organic Chemistry from the University of Notre Dame and a B.S. in Chemistry from Creighton University.