Assistant United States Attorney

An assistant United States attorney (AUSA) is a career civil servant lawyer in the United States Department of Justice who serves under the United States Attorney for a federal judicial district. AUSAs represent the U.S. federal government in civil and appellate litigation and in federal criminal prosecutions. Those assigned to the criminal section of a U.S. Attorney's Office are commonly known as federal prosecutors.

AUSAs are rarely hired directly out of law school and often have significant experience before entering the U.S. Attorney’s Office.