 Shum was most recently the manager of Israeli side Hapoel Tel Aviv, after he replaced Dror Kashtan.He led Hapoel into the Knockout stage of the 2006–07 UEFA Cup after beating Ukrainian side Chornomorets Odesa 4–1 on aggregate in the first round, and progressing in 2nd place from their group.In the 2007–08 season, Shum managed Beitar Jerusalem for a year and was very successful by leading the team to a double.