Mr. Klein is board President for the Global Warming Mitigation. He currently serves as  Chairman of the board of Costar Group, and as Chairman of the board of directors and Chief Executive Officer of The Sunlight Foundation, a non-profit public education organization which he founded in 2005, and as Vice Chairman of the board of directors, Lead Director, Chairman of the audit and corporate governance & nominating committees, and member of the compensation committee of Tutor Perini Corporation, a publicly-held construction company. From 1998 to 2011, he served on the  board of directors of SRA International, Inc., a formerly publicly held provider of technology and strategic consulting services and solutions which was sold in June 2011. Mr. Klein is also a director of ASTAR Air Cargo, Inc., a privately held company. He also serves as Chairman of the board of directors of The Shakespeare Theatre and is the Chair of Costar.

Company, as a director and secretary of the American Himalayan Foundation, as a director of the  NAACP Legal Defense and Education Fund, and as a trustee of the Aspen Music Festival and School and the Aspen Institutes. From 1974 through 2005, he was a partner of the law firm now known as Wilmer Cutler Pickering Hale & Dorr, LLP. Mr. Klein received a B.B.A. and a J.D. from the University of Miami and an L.L.M. from Harvard University.