William K. Reilly is a Founding Partner of Aqua International Partners, LP, a private equity fund dedicated to investing in companies engaged in water and renewable energy, and a Senior Advisor to TPG Capital, LP, an international investment partnership. In 2010, he was appointed by President Barack Obama co-chair of a commission to investigate the Deepwater Horizon oil spill in the Gulf of Mexico.

Reilly served as the first Payne Visiting Professor at Stanford University (1993-1994), Administrator of the U.S. Environmental Protection Agency (1989-1993), president of the World Wildlife Fund (1985-1989), president of The Conservation Foundation (1973-1989), and director of the Rockefeller Task Force on Land Use and Urban Growth from (1972-1973). He was head of the U.S. delegation to the United Nations Earth Summit at Rio in 1992.

Reilly is Chairman Emeritus of the Board of the World Wildlife Fund, Co-Chair of the National Commission on Energy Policy, Chair of the Advisory Board for the Nicholas Institute for Environmental Policy Solutions at Duke University, Chair of the Board for the Global Water Challenge and a Director of the Packard Foundation, the American Academy in Rome and the National Geographic Society. He also serves on the Board of Directors of DuPont, ConocoPhillips and Royal Caribbean International. In 2007 Reilly was elected to the American Academy of Arts and Sciences. He holds a B.A. degree from Yale, J.D. from Harvard and M.S. in Urban Planning from Columbia University.

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