Hobcroft directed the
New South Wales State Conservatorium of Music (now known as the Sydney Conservatorium of Music) between 1972 and 1982. The year after he took over, the first
jazz course to be offered by an Australian tertiary institution commenced there. This followed an approach by the jazz musician
Don Burrows. He also oversaw the first courses in
church music and
electronic music, a rich visiting artists program, and the establishment of regional music centres. Other courses and activities expanded on an unprecedented scale, and Hobcroft's influence over ten years is considered as significant as that of
Sir Eugene Goossens in the 1950s. During his leadership, the Conservatorium adopted the modern educational profile recognised today. His vision of a "Music University" was realised, in which specialised musical disciplines including both classical and jazz performance, music education, composition and musicology enriched each other. In 1973 he conducted Larry Sitsky's
The Fall of the House of Usher in what was the first evening performance of an opera in the
Sydney Opera House. From 1972 to 1982, he was President of the
Federated Music Clubs of Australia. ==Sydney International Piano competition==