Board of Directors


James R. Levy

James Levy is based in New York, joined Warburg Pincus in 2006 and focuses on energy investments. Previously, he worked at Kohlberg & Company, a middle-market private equity investment firm, and Wasserstein Perella & Co. He is a director of Antero Resources, Black Swan Energy, Brigham Resources, EnStorage, Hawkwood Energy, Independence Resources Management, Laredo Petroleum and Suniva. Additionally, he is a former director of Broad Oak Energy. Mr. Levy received a B.A. in history from Yale University.


Jacob Strauss

Jacob Strauss joined Warburg Pincus in 2010 and focuses on investments in the energy industry. Prior to joining Warburg Pincus, he was in the consumer products and retail investment banking group at Citigroup in New York. He is a Director of Independence Resources Management, RimRock Oil & Gas, RS Energy Group and Velvet Energy, and also works with Canbriam Energy. Mr. Strauss received a B.A. magna cum laude in economics from Princeton University.


Roger Pinkerton

Roger Pinkerton has more than 37 years of experience in the upstream oil industry. He began his career with Conoco where he spent 25 years in various domestic and international leadership roles. In his last four years, he served as General Manager Global Exploration. His next 10 years were spent at Marathon Oil where he served as Director for International, Gulf of Mexico and North America Onshore Exploration. Following that, Mr. Pinkerton became VP Exploration for Canadian International Oil Corporation for one year before forming R. Pinkerton Consulting LP.

Mr. Pinkerton has served as Board Chairman of the American Geological Institute Foundation and Board Chairman of the Offshore Energy Center where he remains on the Board. He holds BS and MS degrees in Geophysics from Texas Tech University.


Jeffrey B. Sherrick

Jeff Sherrick has worked in the upstream E&P business for over 39 years and was a member of the executive management teams responsible for setting and implementing their respective company’s strategy for over half of his career. He most recently served as Executive Vice President - Exploration, Business Development and E&P Technology for Southwestern Energy Company (SWN). At SWN, he was responsible for building the company’s US onshore unconventional resources portfolio and leading the technical quest to accelerate the unconventional learning curve across the company.

Prior to joining Southwestern Energy in 2008, he worked for Houston Exploration, El Paso, Enron Global Exploration and Production, Enron Oil & Gas (EOG Resources) and Tenneco Oil Company. His experience with these entities includes P&L responsibility for international and US-based companies/projects located in both marine and land environments. He also held commercial and technical leadership roles in reservoir engineering, business development, strategic planning and portfolio management/capital allocation/economic analysis.

Mr. Sherrick previously served as a director of Prize Petroleum, a private equity-backed company, and he holds a Bachelor of Science degree in Petroleum Engineering from Marietta College.


Ken S. Woolner

Ken Woolner has over 20 years of experience in the oil and gas industry and currently serves as President, Chief Executive Officer and Director of Velvet Energy Ltd., a private Calgary-based production and exploration company. From February 2006 to June 2011, Mr. Woolner served as a corporate director. From April 2005 to February 2006, he was Executive Chairman of White Fire Energy Ltd., a public oil and gas company operating in Western Canada and a trustee of Sequoia Oil & Gas Trust. Mr. Woolner was President and Chief Executive Officer of Lightning Energy Ltd. from December 2001 to April 2005, when it merged with Argo Energy Ltd. to create Sequoia Oil & Gas Trust and White Fire Energy Ltd. Mr. Woolner was the President and Chief Executive Officer and a director of Velvet Exploration Ltd. from April 1997 to July 2001 when it was acquired by El Paso Oil & Gas Inc., and was a director of El Paso Oil and Gas Canada Inc. from July 2001 to May 2002.

Mr. Woolner is a professional engineer and received a Bachelor of Science degree in Geological Engineering from the University of Toronto.


Mike D. Van Horn - Chief Executive Officer

Mike Van Horn has over 35 years of broad geoscience and leadership experience in the industry. Mike retired from Newfield Exploration in March 2014 after 8 years as V.P. Geoscience and Sr. V.P. Exploration. He played a significant role in transitioning Newfield from a predominantly conventional E&P company to an unconventional resource player. Prior to Newfield, Mike held various leadership positions at EOG Resources and its predecessor companies for 13 years from 1993 to 2006. Positions included V.P. International Exploration and Director of Unconventional Exploration. Domestically, Mike and his team provided the groundwork evaluation of basins across North America for EOG’s unconventional efforts. He held leadership and technical roles at previous employers including British Gas International, Tenneco Rocky Mountains, Terra Scan Group and Energy Reserves Group. Mike holds an MSc Geology from the Colorado School of Mines and BSc Geological Engineering from the Mackay School of Mines, University of Nevada.


Rod L. Steward - Chief Corporate Officer

Rod Steward brings over 25 years of upstream experience as an accomplished leader and reservoir engineer to Independence Resources Management. Rod joined private equity E&P firm Sheridan Production Company in 2007 during its start-up phase, where he most recently held the titles of Exploitation Manager and Manager of Capital Planning and Analysis. He fulfilled multiple roles during the evaluation and integration of eight successful acquisitions with an aggregate purchase price of $5.2 billion and was ultimately responsible for the evaluation, planning, execution and results of all drilling and work-over activity. Prior to Sheridan, Rod was the Texas Gulf Coast Reservoir Manager for El Paso Production. He held various senior and staff level reservoir engineering positions at EOG Resources and its predecessor companies between 1996 and 2005 providing technical analysis and reservoir simulation of conventional and unconventional projects in both domestic and international basins. Rod held various engineering positions at Marathon Oil Company after receiving his BSc degree in Petroleum Engineering from The University of Oklahoma.