Broad capabilities

Renewable energy experts

Enviva is led by a team of executives with decades of experience in renewable energy, finance, manufacturing, and operations.

John Keppler

Chairman and Chief Executive Officer

Mr. Keppler is a co-founder and the Chairman and Chief Executive Officer of Enviva. Over the past decade, Mr. Keppler has been responsible for setting Enviva’s strategic direction and leading the company’s growth from a startup company to become the world’s largest producer of woody biomass fuels with operations in Mississippi, Alabama, North Carolina, South Carolina, Virginia, and Florida. The company’s portfolio of facilities now comprises about 4.5 million metric tons of production capacity. As part of the company’s strategic vertical integration, these processing facilities export to customers in the United Kingdom, the European Union, Japan, and South Korea through Enviva’s wholly-owned purpose-built wood pellet port facilities Chesapeake, Virginia and Wilmington, North Carolina and also through deep water marine terminals in Panama City, Florida, and Mobile, Alabama.

Mr. Keppler led Enviva Partners, LP (NYSE: EVA) to its initial public offering on the New York Stock Exchange on April 29, 2015, making it the first publicly traded company in the industry.

Mr. Keppler serves on the Board of the Sustainable Biomass Program (SBP), a non-profit standard-setting organization that manages a voluntary certification system designed for woody biomass used in energy production.

Mr. Keppler holds a Bachelor of Arts in Political Economy from the University of California, Berkeley, as well as a Master of Business Administration from the Darden Graduate School of Business Administration at the University of Virginia.

Ralph Alexander

Ralph Alexander


Mr. Alexander has served as Director on the Board of Directors of our General Partner since our inception in November 2013. Mr. Alexander has served as the President and CEO of Talen Energy since December 2016. He became affiliated with Riverstone Holdings LLC in September 2007. For nearly 25 years, Mr. Alexander served in various positions with subsidiaries and affiliates of BP plc, one of the world’s largest oil and gas companies. From June 2004 until December 2006, he served as Chief Executive Officer of Innovene, BP’s $20 billion olefins and derivatives subsidiary. From 2001 until June 2004, he served as Chief Executive Officer of BP’s Gas, Power and Renewables and Solar segment and was a member of the BP group executive committee. Prior to that, Mr. Alexander served as a Group Vice President in BP’s Exploration and Production segment and BP’s Refinery and Marketing segment. He held responsibilities for various regions of the world, including North America, Russia, the Caspian, Africa, and Latin America. Prior to these positions, Mr. Alexander held various positions in the upstream, downstream, and finance groups of BP. Mr. Alexander has served on the board of Talen Energy Corporation since June 2015. From December 2014 through December 2016, Mr. Alexander served on the board of EP Energy Corporation. He has previously served on the boards of Foster Wheeler, Stein Mart, Inc., Amyris, and Anglo‑American plc. Mr. Alexander holds an M.S. in Nuclear Engineering from Brooklyn Polytech (now NYU School of Engineering—Polytechnic) and an M.S. in Management Science from Stanford University.

John C. Bumgarner, Jr.


Mr. Bumgarner has served as a Director on the Board of Directors of our General Partner since April 2015. Mr. Bumgarner has been engaged in private investment since November 2002, and currently assists in operating a family-owned, multi-faceted real estate company. Mr. Bumgarner previously served as Co-Chief Operating Officer and President of Strategic Investments for Williams Communications Group, Inc., a high technology company, from May 2001 to November 2002. Mr. Bumgarner joined The Williams Companies, Inc., in 1977 and, prior to working at Williams Commuications Group, Inc., served as Senior Vice President of Williams Companies Corporate Development and Planning, President of Williams International Company, and President of Williams Real Estate Company. He most recently served as a Director of Energy Partners, Ltd., an oil and natural gas exploration and production company, from January 2000 to February 2009, and at Market Planning Solutions Inc. from February 1982 until April 2011. Mr. Bumgarner holds a B.S. from the University of Kansas and an M.B.A. from Stanford University. Mr. Bumgarner’s substantial experience as an executive at a conglomerate and as a director on boards of public and private companies engaged in a variety of industries provides him with unique insight that is particularly helpful and valuable to the Board of Directors of our General Partner.

Jim H. Derryberry


Mr. Derryberry has served as a Director on the Board of Directors of our General Partner since July 2018. Mr. Derryberry served as a director of USA Compression GP, LLC from January 2013 to April 2018. He is currently a special advisor for Riverstone Holdings LLC where he held the office of Chief Operating Officer and Chief Financial Officer until 2006. Prior to joining Riverstone, Mr. Derryberry was a Managing Director of J.P. Morgan where he was head of the Natural Resources and Power Group. He had previously served in the Goldman Sachs Global Energy and Power Group where he was responsible for mergers and acquisitions, capital markets financing, and the management of relationships with major energy companies. He also served on the Board of Directors of Magellan GP, LLC, the general partner of Magellan Midstream Partners, L.P, from 2005-2006. Mr. Derryberry has been a member of the Board of Overseers for the Hoover Institution at Stanford University and is a member of the Engineering Advisory Board at the University of Texas at Austin. He received his B.S. and M.S. in Engineering from the University of Texas at Austin and earned an M.B.A. from Stanford University.

Robin J. A. Duggan


Mr. Duggan has served as a Director on the Board of Directors of our General Partner since our inception in November 2013. Mr. Duggan was a Managing Director of Riverstone from 2014 to June 2019, when he became a Senior Advisor to Riverstone, and previously served as a Principal of Riverstone for seven years. Prior to joining Riverstone, Mr. Duggan was the founder of Commodity Optimization Ventures Ltd., a business that provided advice to clients in the private equity industry, including Texas Pacific Group. Before founding his business, he served for over 17 years in various positions with subsidiaries and affiliates of BP plc. From 2004 to 2005, Mr. Duggan was the Vice President of European Business Optimization at Innovene, BP’s olefins and derivatives subsidiary, where he was responsible for commercial activity for olefins and refining in Europe and also oversaw Innovene’s successful separation from BP in Europe. From 1999 to 2003, Mr. Duggan held a number of senior level positions in BP’s Petrochemicals segment, including serving as the Performance Unit Leader of the Aromatics and Olefins division, Global Business Manager of the Styrene business unit, and the Planning, Performance and Strategy Manager of the Acetyls business unit. Prior to that time, Mr. Duggan held various positions in BP’s Upstream segment in the United Kingdom, Australia, and Venezuela over a period of 10 years. Mr. Duggan serves on the boards of a number of Riverstone portfolio companies and their affiliates. He holds a B.A. in Biochemistry from Oxford University and an M.S. in Management Science from Stanford University. Based on his strong background in various aspects of the energy industry, we believe Mr. Duggan has the requisite set of skills to serve as a Director.

Christopher B. Hunt


Mr. Hunt has served as a Director on the Board of Directors of our General Partner since April 2016. Mr. Hunt is a partner of Riverstone and joined Riverstone in 2008. In addition to serving on the boards of a number of Riverstone portfolio companies and their affiliates, he also currently serves on the Board of Directors of NTR Plc. Prior to joining Riverstone, Mr. Hunt ran international power development and generation businesses for BP plc and Enron Corporation. Mr. Hunt received his B.A. from Wesleyan University and his M.B.A. from Columbia University. He has also completed various post-graduate programs at Harvard University, Stanford University, the Massachusetts Institute of Technology, and Oxford University. Mr. Hunt brings extensive experience in the renewable energy, conventional power, and natural gas industries to the Board of Directors of our General Partner.

William K. Reilly


Mr. Reilly has served as a Director on the Board of Directors of our General Partner since April 2015. Mr. Reilly served as Administrator of the U.S. Environmental Protection Agency from 1989 to 1993. From October 1997 to December 2009, Mr. Reilly served as President and Chief Executive Officer of Aqua International Partners, an investment group that finances water improvements in emerging markets. He also served as Senior Advisor to TPG Capital from September 1994 to December 2016. In 2010, Mr. Reilly was appointed by President Obama as co-chair of the National Commission on the BP Deepwater Horizon Oil Spill and Offshore Drilling and, in 2012, President Obama named Mr. Reilly to the Council for Global Development. He currently serves as a Director and Chair of the Board Committee on environment, safety, security, and health of Royal Caribbean Cruises Ltd. Mr. Reilly served as a Director of Conoco Inc. from 1998 until its merger with Phillips Petroleum Company in 2002, and thereafter served as a Director of ConocoPhillips until May 2013. From 1993 until April 2012, Mr. Reilly also served on the Board of Directors of E.I. duPont de Nemours and Company and was a Director of Energy Future Holdings from 2007 to 2019. He has also previously served as the first Payne Visiting Professor at Stanford University, President of the World Wildlife Fund, and President of The Conservation Foundation. He is Chairman Emeritus of the World Wildlife Fund and Chairman of the Nicholas Institute for Environmental Policy Solutions at Duke University. Mr. Reilly’s extensive environmental regulatory experience and his service on various other boards make him well qualified to serve as a member of the Board of Directors of our General Partner, and allow him to provide unique and valuable perspective on matters critical to our operations.

Gary L. Whitlock


Mr. Whitlock has served as a Director on the Board of Directors of our General Partner since April 2016. Mr. Whitlock served as Executive Vice President and Chief Financial Officer of CenterPoint Energy, Inc. from September 2002 until April 2015. From April 2015 until his retirement on October 1, 2015, he served as Special Advisor to the Chief Executive Officer of CenterPoint. While at CenterPoint, Mr. Whitlock was responsible for accounting, treasury, risk management, tax, strategic planning, business development, emerging businesses, and investor relations. From July 2001 to September 2002, Mr. Whitlock served as Executive Vice President and Chief Financial Officer of the Delivery Group of Reliant Energy, Incorporated. Prior to joining Reliant, Mr. Whitlock served as Vice President of Finance and Chief Financial Officer of Dow AgroSciences LLC, a subsidiary of The Dow Chemical Company, from 1998 to 2001. He began his career with Dow in 1972, where he held a number of financial leadership positions, both in the United States and globally. While at Dow, Mr. Whitlock served on the boards of directors of various Dow entities. Mr. Whitlock is a Certified Public Accountant and received a B.B.A. in Accounting from Sam Houston State University in 1972. He has previously served on the Board of Directors of Texas Genco Holdings, Inc., the Board of Directors of the general partner of Enable Midstream Partners, LP from March 2013 to August 2015, the Board of Directors of KiOR, Inc. from December 2010 to June 2015, the Board of Directors of CHI St. Luke’s Health System, The Woodlands, and the Leadership Cabinet of Texas Children’s Hospital. Mr. Whitlock brings extensive experience in public company financial management and reporting to the Board of Directors of our General Partner.

Carl L. Williams


Mr. Williams has served as a Director on the Board of Directors of our General Partner since our inception in November 2013. Mr. Williams is a Partner at Riverstone and Co-Head of Riverstone Power. He also serves on the boards of a number of Riverstone portfolio companies and their affiliates. Prior to joining Riverstone in 2008, Mr. Williams was in the Global Natural Resources investment banking group at Goldman, Sachs & Co. from 2005 to 2008. While at Goldman, he focused on mergers and acquisitions and financing transactions in the power generation, alternative energy, oil and gas, and refining industries. Prior to that, he held various positions in engineering and strategic sourcing with Lyondell Chemical Company, a supplier of raw materials and technology to the coatings industry, from 1999 to 2004. He received his M.B.A. from Columbia Business School, and holds a B.S. in Chemical Engineering and a B.A. in Economics and Managerial Studies from Rice University. We believe that Mr. Williams’ extensive experience in, and knowledge of, each of the finance and energy sectors enable him to provide essential guidance to the Board of Directors of our General Partner and our management team.

Janet S. Wong


Ms. Wong has served as a Director on the Board of Directors of our General Partner since April 2015. Since January 2013, Ms. Wong has served as a National Executive Advisor for Ascend, a non‑profit professional organization that enables its members, corporate partners, and the community to realize the leadership potential of Asians in global corporations. At Ascend, Ms. Wong leads the largest network of Asian corporate board directors and is a lecturer for its Executive Insight courses. In January 2018, she was elected to the Board of Trustees for the Computer History Museum. In addition, she serves on the Louisiana Tech University Foundation Board and the College of Business Advisory Board. Ms. Wong served as a Partner at Grant Thornton LLP from August 2008 through July 2012, where she was the Central Region Corporate and Partnership Services Lead Partner. In 2008, Ms. Wong retired from the partnership of KPMG, culminating a career with the global firm from 1985 through 2008, where she served as a National Industry Practice Lead Partner. Ms. Wong has extensive experience working with clients in the consumer markets, energy, financial services, manufacturing, and technology sectors. She is a Certified Public Accountant. She holds a Master of Professional Accountancy from Louisiana Tech University and a Master of Taxation from Golden Gate University. We believe Ms. Wong’s audit expertise and her professional and leadership experience enable her to provide essential guidance to the Board of Directors of our General Partner and our management team.