He is currently senior research associate with the School of Philosophical, Historical and International Studies at Monash University.
A History of Wine in Victoria (1994), Victorian Icon: The Royal Exhibition Building, Melbourne (1996), Owen Suffolk's Days of Crime and Years of Suffering (2001).
Together with Tom Heenan he wrote the chapter 'Don Bradman: Just a Boy From Bowral' for the Cambridge Companion to Cricket.
Dunstan taught Public History and Australian Studies at Monash University from 1994 until 2014.
He has worked as a freelance journalist, writing for newspapers and magazines such as The Age, Business Review Weekly, and The Sun-Herald, and extensively in scholarly journals.