Board of Directors

Harry Quarls

Chairman of the Board

Harry Quarls currently serves as a Managing Director at Global Infrastructure Partners, a $33 billion infrastructure fund. He also serves as a Director for Woodbine Holdings LLC, Fairway Resources LLC, and Opal Resources LLC. He is Chairman of the Board for Woodbine Holdings.

Previously, Mr. Quarls served as Managing Director and Practice Leader for Global Energy at Booz & Co., a leading international management consulting firm, and served as member of Booz’s Board of Directors.

Mr. Quarls earned a M.B.A. degree from Stanford University and also holds ScM. and B.S. degrees, both in chemical engineering, from M.I.T. and Tulane University, respectively.

Darin G. Holderness


Darin G. Holderness, CPA, was the Senior Vice President, Chief Financial Officer and Treasurer of Concho Resources until May 2016. Mr. Holderness has over 20 years of experience in the energy sector including nine years with KPMG LLP where his practice was focused in the energy industry and over 17 years in industry in ever increasing roles of responsibility including serving as Vice President and Controller of Pure Resources, Vice President and Chief Financial Officer of Basic Energy Services, Vice President and Chief Accounting Officer of Pioneer Natural Resources, and most recently as Senior Vice President and Chief Financial Officer of Eagle Rock Energy Partners.

Mr. Holderness is a 1986 graduate of Boise State University with a Bachelor of Business Administration in Accounting and is a Certified Public Accountant.

Marc McCarthy


Marc McCarthy is a Senior Managing Director at Wexford Capital LP, an energy focused asset management firm, having joined them in 2008.  Marc currently serves as Chairman of Mammoth Energy Services and previously served as director of Coronado Midstream, LLC. and Energy Partners Corp. as Chairman from 2009-2014.

Previously, Mr. McCarthy worked in the Global Equity Research Department of Bear Stearns & Co., Inc. and was responsible for coverage of the international oil and gas sector. Mr. McCarthy joined Bear Stearns & Co. in 1997 and held various positions of increasing responsibility until his departure in June 2008, at which time he was a Senior Managing Director.

Mr. McCarthy is a Chartered Financial Analyst and received a B.A. in Economics from Tufts University.

Jerry R. Schuyler


Mr. Schuyler is currently Chairman of the Board of Gastar Exploration Inc. He served as Executive Vice President, Chief Operating Officer and Director of Laredo Petroleum, Inc. beginning in June 2007, was promoted to President and Chief Operating Officer in July 2008 and retired in July 2013. Mr. Schuyler served as an independent director for Yates Petroleum Corporation from December 2015 until the sale of the company in October 2016; independent director for Rosetta Resources Inc. from December 2013 until the company was sold in July 2015 and independent director for Gulf Coast Energy Resources, LLC from 2010 until the sale of the company in April 2015.

Mr. Schuyler holds a B.S. in Petroleum Engineering from Montana College of Mineral Science and Technology and attended several graduate business courses at the University of Houston.