Duncan Hazlett McGuire (ca. 1943 – 10 July 1989), was an Australian musician, songwriter, recording engineer and producer. McGuire was a founding member of the jazz fusion band Ayers Rock from 1973 until he left in 1976. As a bass guitarist, he appeared in several of Doug Parkinson's groups, including the Questions (1965–1968), Doug Parkinson in Focus (1968–1969) and the Southern Star Band (1978–1981). He went into music production in the early 1980s; in October 1980, he co-produced and engineered the debut self-titled album by Australian rock band INXS. Duncan McGuire was diagnosed with lung cancer, and he died in July 1989 of an associated brain tumour, aged 46.