Garry McDonald trained in acting at the National Institute of Dramatic Art before beginning work in Australian television and stage productions, where he first performed a satirical television persona that he continued to develop through live and recorded media. His early work integrated character creation with broadcast performance, leading to long-form television appearances and national exposure. McDonald sustained parallel involvement in theatre, performing in ensemble and musical productions while expanding into dramatic television roles. He contributed to television series produced with national partners and undertook voice performance across recorded media.