Mr. McMahon is a founding partner and is a managing director on the energy investment team. He is currently a director of Forge Energy, LLC, Stonegate Production Company, LLC and Global Oilfield Services, LP. Mr. McMahon has also served on the board of directors of several public energy companies, including The Marine Drilling Companies Inc., Spinnaker Exploration Inc. (both with Mr. Newman), TPC Corporation, Transocean Ltd., Numar Corporation and Triton Energy.

Mr. McMahon's energy investing and advising experience spans more than 30 years and includes founding RockPort Capital Partners, an energy and clean-tech venture capital firm, and heading global energy investment banking at Salomon Brothers and Lehman Brothers. He also worked at Harvard Management Company, where he was responsible for energy-related private equity investments, and Amgo Funds. Mr. McMahon has collaborated with Mr. Newman for over 20 years on a number of energy investments. He introduced Mr. Newman to the management teams of five companies in which Warburg Pincus subsequently invested: Newfield Exploration Company, Spinnaker Exploration Inc., ElectroMagnetic GeoServices AS, Fairfield Energy Ltd. and Kosmos Energy Holdings, LLC. Immediately prior to founding Pine Brook, Mr. McMahon was an executive counselor to the Governor of Rhode Island and a member of the Governor's cabinet, with primary responsibility for economic and infrastructure development. Mr. McMahon is a trustee of Salve Regina University in Newport, RI.

Mr. McMahon holds an A.B. in American Civilization from Brown University and was a member of the Program for Management Development (PMD 33) at Harvard Business School.