William M. Diefenderfer III is a partner of Diefenderfer, Hoover, Boyle & Wood in Pittsburgh, Pa., since 1991. From 2000 to 2002, Mr. Diefenderfer III was the chief executive officer and president of enumerate Solutions, Inc. He also served as treasurer and chief financial officer of Icarus Aircraft, Inc. from 1992 to 1996. Previously, he served as deputy director of the Office of Management and Budget from 1989 to 1991. He serves on the Board of Directors of U-Store-It Trust (chairman). He was a member of the Standing Advisory Group of the Public Company Accounting Oversight Board, from 2004 to 2005, and Commission on the Future for America's Veterans. Mr. Diefenderfer's legal background combined with his involvement in the executive branch of government and his leadership roles in business, bring valuable experience to the Board in overseeing, among other things, political and financial strategy and business operations.