After retiring, Dubac became a manager, managing
NK Osijek from 1951 to 1955,
NK Čelik Zenica in 1958 and
NK Trešnjevka from 1959 to 1966. He won the
Croatian-Slovenian League (II tier competition of football in Yugoslavia at the time) with Osijek in the
1952–53 season and got the club promoted to the
Yugoslav First League. He won the Second League with Trešnjevka as well, this time in the
1962–63 season in the West Division. He then led Trešnjevka in the Yugoslav First League for three seasons, from 1963 to 1966, until the club got relegated. ==Personal life==