 In 1987, Healy moved to his hometown club, Derry City, where he won a clean-sweep of League Championship, FAI Cup (where he scored the only goal in the final) and League of Ireland Cup, (a domestic treble) in 1988–89; the club's first major honours since their days in the Irish League, over twenty years earlier.He also scored Derry's first ever goal in the Premier Division on 20 September 1987.He scored 38 goals in 162 total appearances for his home town club.