Composer, musician, music director.
Largely associated with the Phillip Street Theatre, Sydney, revues of the mid-1950s, in association with writer/lyricists John McKellar and Gerry Donovan and director/ producer William Orr. As with McKellar and Donovan, Mulcahy's early theatre experience involved university revues while he was a student at Sydney University. The trio's productions between 1953 and 1955 include Merry Go Round and Maid in Egypt (both 1953), Top of the Bill (1954, the first Phillip Street Theatre revue), Hit and Run (1954), and Hat Trick (1955).
Shortly after working on Hat Trick, the three collaborators travelled to England where they sold material for small cabarets and intimate revues. While McKellar returned to Australia eighteen months later, both Donovan and Mulcahy remained in England for an unknown period of time. Mulcahy later returned to Australia, and in 1982 he and McKellar put together Four Lady Bowlers in a Golden Holden (Kinselas Cabaret Theatre, Sydney).
