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.



Erik Hoover currently serves as the Chief Operating Officer for ATX Energy Partners in Austin, Texas, and brings 30 years of US onshore operational experience to the table. Prior to ATX, he served as EVP of Operations for Brigham Resources, Director of Operations for Statoil’s Bakken Unit, and Operations Manager for Brigham Exploration. Erik spent his first nine years in the industry with Mewbourne Oil Company. He received a Bachelor of Science in Petroleum Engineering from Texas A&M University.



Peter Jeffe serves as Chief Commercial Officer and Asset Manager for Hawkwood Energy where he leads the company’s M&A, Land, Strategy, Subsurface, and Planning functions. Mr. Jeffe initiated the business plan for Hawkwood Energy in late 2010 and went on to become a Co-Founder of the company in 2011. During his tenure with Hawkwood, Mr. Jeffe has led the successful completion of more than 30 acquisitions totaling in excess of $800MM. In 2015, Mr. Jeffe was named to Oil and Gas Investor’s “30 under 40” list. In 2017, he was added to Hawkwood’s Board of Directors. Prior to the formation of Hawkwood, he worked as an Analyst at Goldman Sachs & Co. in New York City. He holds a BA in Economics & Business from Lafayette College where he played Division-I golf, and an MBA from Stanford University.



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.



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.