James Murdoch (1930–2010), also known by the stage name Jaime Sebastian, was an Australian arts administrator, musicologist, composer, journalist, and broadcaster.
He founded and served as the inaugural director of the Australian Music Centre and played an important role in promoting the works of Peggy Glanville-Hicks.
Murdoch gravitated to bohemian circles and befriended Tilly Devine, Bea Miles, and Sunday Reed.
He also assumed the conductor's podium for the company on the strength of his (untrue) claim that he had conducted student orchestras at the Sydney Conservatorium.
During the 1950s and 1960s, Murdoch was an active member of the International Society for Contemporary Music, serving as secretary of its Melbourne, Sydney, and other Australian branches.
Murdoch developed a tendon contraction through overuse of his hands and switched his career from being a pianist to being a concert promoter based in London.
Among others, his company managed Cathy Berberian, Harrison Birtwistle, Leo Brouwer, Paul Crossley, Peter Maxwell Davies, the Pierrot Players (later known as the Fires of London), Hans Werner Henze, Igor Kipnis, Roger Woodward, and the Budapest Chamber Orchestra.
In 1981, Murdoch was sacked by the Music Board of the Australia Council, the funding body for the AMC, for what they perceived as inept financial administration.