William K. Reilly is a founding partner of Aqua International Partners, a private equity fund sponsored by the U.S. Overseas Private Investment Corporation dedicated to investing in water projects and companies in developing countries. Prior to that he was the Payne Visiting Professor at Stanford University (1993-1994), Administrator of the U.S. Environmental Protection Agency (1989-1993), and president of the World Wildlife Fund (1985-1989). He served as head of the U.S. delegation to the Earth Summit at Rio in 1992.
Reilly is chairman of the board of World Wildlife Fund, and serves on the Board of Directors of DuPont, Conoco, Royal Caribbean International and Ionics Inc. He is also a director of the David and Lucile Packard Foundation, National Geographic Society and the American Academy in Rome. By appointment of the President, he serves as one of the seven members of the Presidio Trust of San Francisco, which manages The Presidio National Park.