Ogden began his career in
Washington, D.C., as an associate from 1983 until 1985 at the law firm of Ennis Friedman & Bersoff, and he served as a partner at that firm from 1986 until 1988. From 1988 until 1994, Ogden was a partner in the Washington, D.C., office of
Jenner & Block. From 1994 to 1995, he served as the deputy general counsel and legal counsel for the
United States Department of Defense. From 1995 to 1997, he was an
associate deputy attorney general in the
United States Department of Justice. From 1997 to 1998, Ogden was counselor to United States Attorney General Janet Reno, and from 1998–99, he was chief of staff to Attorney General Reno. From 1999–2000, he was acting
assistant attorney general and from 2000 to 2001, the Senate-confirmed assistant attorney general in charge of the Civil Division in the
United States Department of Justice. From June 2001 until November 2008, and again since April 2010, Ogden has been a partner in the Washington, D.C., office of the law firm
Wilmer Cutler Pickering Hale and Dorr ("WilmerHale"), leading the firm's Government and Regulatory Litigation Practice Group. In private practice, he has represented a wide range of businesses, trade associations, and individuals in litigation, arbitration and investigations against the United States government, state governments and foreign governments, and private parties, including cases under the Administrative Procedure Act, fair lending laws, the False Claims Act, fraud racketeering laws, international litigation, and arbitration. ==Deputy attorney general==