Ian David Gust (born 15 January 1941) is an Australian medical researcher, virologist, and former science administrator.
Gust returned to Fairfield in 1970 and was appointed a medical virologist at the Infectious Diseases Hospital, a position he held for over twenty years.
In collaboration with Allan Ferris and Stephen Locarnini at Monash University these laboratories were the first to isolate hepatitis A virus in patients.
Between 1991 and 2008, Gust served as director of research and development for the Commonwealth Serum Laboratories,[1] now listed as CSL Limited, where he was closely involved in the company's successful expansion in Australia and internationally.
He has been a Director of the National Hepatitis Reference Centre (1979-1990) and between 1989 and 1992 served as the Commonwealth Chief Medical and Scientific Adviser on AIDS.