Board of Directors


John A. Holland joined Warburg Pincus in 2010 and is based in New York. Previously, he worked as an investment professional at GTCR, a middle-market private equity firm, and as an analyst at UBS Investment Bank. He is a director of Hawkwood Energy and also works with Brigham Resources and Laredo Petroleum (NYSE: LPI). Mr. Holland holds an A.B. in economics with honors from the University of Chicago and an M.B.A. from the Stanford Graduate School of Business.



Robert Jeffe has more than 35 years of investment banking experience and served at Morgan Stanley and Credit Suisse as Head of Global Energy and Natural Resources Group. Mr. Jeffe was also Senior Vice President of Corporate Business Development and Strategic M&A at General Electric.  He is a Director of Associated Banc-Corp, the largest public bank in Wisconsin.  Mr. Jeffe received an A.B. degree from Dartmouth College and M.B.A. from the Stanford University Graduate School of Business. 


Cameron Smith   |   WARBURG PINCUS director

After receiving his MSc in Geology from Penn State, Mr. Smith worked as a geologist for his family’s public E&P companies in Canada and Australia. Then, he founded and for thirteen years ran his own private E&P company in Tulsa. In 1992, he founded and became the Sr. Managing Director COSCO Capital Management, an investment bank that focused on matching oil and gas start-ups with private equity. He sold COSCO in June 2008 to Rodman & Renshaw and spent the next 18 months as the latter’s Head of Energy. He then took a two year sabbatical, travelling around the world and publishing seven travelogues with his journals and photographs. In late 2011, he joined the board of Mid-Con Energy, a public MLP based in Tulsa, and became a part time Senior Advisor to the Energy Group of Warburg Pincus. In late 2016, Mr. Smith joined the boards of Hawkwood Energy LLC and MainSail Energy Ltd, both private E&P affiliates of Warburg Pincus, the former based in Denver, the latter in Calgary.



Romeo Leemrijse leads the Fund's private equity transactions in the industrial products, energy & power sectors. He joined Teachers in 2006 and was most recently director, consumer and retail for Teachers' Private Capital. He has been involved in a number of private equity transactions across various industries while at Teachers' Private Capital.  Mr. Leemrijse has served on a number of boards including AspenLeaf Energy, GNC, Serta Simmons Holdings, Plano Molding Company and Shearers. Romeo is a CFA charterholder and graduated from the University of Calgary with a Bachelor of Commerce degree.



James R. Levy joined Warburg Pincus in 2006 and focuses on investments in the energy industry. Prior to joining Warburg Pincus, he worked as an Associate at Kohlberg & Company, a middle market private equity investment firm, from 2002 to 2006, and as an Analyst and Associate at Wasserstein Perella & Co. from 1999 to 2002. Mr. Levy currently serves on the board of directors of Black Swan Energy, EnStorage, Hawkwood Energy, Laredo Petroleum (NYSE: LPI) and Suniva. He is a former director of Broad Oak Energy. Mr. Levy received a Bachelor of Arts in history from Yale University. 



Howard Mayson has over 35 years of E&P experience mostly with BP in a variety of senior leadership roles. He has worked in North America, the Middle East, Australia and the UK. He ran BP’s businesses in Russia, Angola, the Western N. Slope of Alaska and for much of the last decade was the SVP for BP’s Subsurface Function. In addition to Hawkwood he is a non-executive director for Endurance Energy and Corex Resources in Canada and Fairfield Energy in the N Sea. Howard has an honorary Doctorate from Herriot Watt University, has engineering degrees from MIT and Sheffield University and he attended the Advanced Management Program at Wharton Business School.



James McColgin, an outside director of Hawkwood Energy, is CEO of Phase Change Energy Solutions; a manufacturer of energy saving building materials. Mr. McColgin has over 35 years of experience in the upstream oil industry mainly with Conoco and ConocoPhillips. There he held numerous management positions including President Asia Pacific Region E&P, President Lower 48 and Latin America E&P, and Vice President Worldwide Exploration and Business Development. Jim has a degree in geophysics from Texas A&M and a MSc. in Management from MIT and is an active member of AAPG and SEG. 



Patrick Oenbring has more than 40 years of industry experience. Mr. Oenbring began his career with Conoco where he spent 22 years in a variety of positions including playing a leadership role in several successful large scale startup projects. In 1997, he joined Occidental Petroleum as President and General Manager of Occidental Qatar. He became President and General Manager of Oxy Permian in 2000 in conjunction with Oxy's acquisition of Altura Energy. Oxy Permian was the largest oil producer in Texas and was also the largest business unit in Oxy. Most recently Mr. Oenbring served as VP Western Operations for Harvest Natural Resources where he led the highly successful acquisition, development, and divestment of the Antelope Project in the heart of the Uinta Basin. Mr. Oenbring has a BS in Chemical Engineering from the University of Kansas. 



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.  He 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.  Roger holds BS and MS degrees in Geophysics from Texas Tech University.



Richard Wilken began his career at Conoco before joining Burlington Resources where held a variety of positions. At the time of ConocoPhillips' acquisition of Burlington, he was the Western U.S. Exploration Manager and continued in that role at the combined company.  In 2006, Richard founded Marquette Exploration and was the President of Marquette until Marquette was acquired by Hess Energy in 2011. Richard holds a BS in Geology from the University of Iowa and attended graduate school in Geophysics at the University of Oklahoma.