Lester P. Silverman is Director Emeritus of McKinsey & Company, Inc., having retired from the international management consulting firm in 2005. Mr. Silverman joined McKinsey in 1982 and was head of the firm's Electric Power and Natural Gas practice from 1991 to 1999. From 2000 to 2004, Mr. Silverman was the leader of McKinsey's Global Nonprofit Practice. Previous positions included Principal Deputy Assistant Secretary for Policy and Evaluation in the U.S. Department of Energy from 1980 to 1981 and Director of Policy Analysis in the U.S. Department of the Interior from 1978 to 1980. Mr. Silverman is currently an Adjunct Lecturer at Georgetown University, Washington, D.C., and a trustee of several national and Washington, D.C.-area nonprofit organizations. He has been a director of the Company since May 19, 2006.