Col. Lawrence Wilkerson's last position in government was as Secretary of State Colin Powell's chief of staff (2002-05). He previously was associate director of the State Department's Policy Planning staff under the directorship of Ambassador Richard N. Haass, and member of that staff responsible for East Asia and the Pacific, political-military and legislative affairs (2001-02). Before serving at the State Department, Wilkerson served 31 years in the U.S. Army. During that time, he was a member of the faculty of the U.S. Naval War College (1987-1989), special assistant to General Powell when he was chairman of the Joint Chiefs of Staff (1989-93), and director and deputy director of the U.S. Marine Corps War College at Quantico, Virginia (1993-97). Wilkerson retired from active service in 1997 as a colonel and began work as an adviser to General Powell. He has also taught national security affairs in the Honors Program at George Washington University. He is currently distinguished visiting professor of government and public policy at the College of William and Mary in Williamsburg, Virginia and working on a book about the first George W. Bush administration.