An assistant United States attorney (AUSA) is an official career civil service position in the U.S. Department of Justice composed of lawyers working under the U.S. attorney of each U.S. federal judicial district.[1] They represent the federal government of the United States in civil and appellate litigation and in federal criminal prosecutions. Assistant U.S. attorneys working in their office's criminal section are often called federal prosecutors.
AUSAs are rarely hired directly out of law school and often have significant experience before entering the U.S. Attorney’s Office.