Law clerk, Hon. Louis H. Pollak, U.S. District Court, Eastern District of Pennsylvania, 1987-1988
Marvin M. Karpatkin fellow, American Civil Liberties Union, New York City, 1988-1989
Assistant counsel, NAACP Legal Defense and Educational Fund, New York City, 1989-1994
Assistant to the solicitor general, U.S. Department of Justice, 1994-1997
Faculty, Georgetown University Law Center, 1997-1998, 2000-2013; associate professor, 1997-1998, 2000-2005; professor, 2005-2013
Deputy assistant attorney general, Office of Legal Counsel, U.S. Department of Justice, 1998-2000
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