He worked as an intern in Alsace Mechanical Industries until 1976, when he returned to Homeland. He worked at capital Metro as the operational director from 1976 to 1979.Mir-Salim served as the national police chief following the Revolution.He was proposed by then president Abulhassan Banisadr in July 1980 as a candidate for the prime minister as a compromise candidate acceptable to both Banisadr and the Majlis dominated by the Islamic Republican Party.