He has been a faculty member at Charles Sturt University in Australia since 2008,[1] and is an honorary fellow of the Royal Society of New Zealand.
[2] O'Sullivan currently works at Charles Sturt University[1] where he is a professor of political science.
O'Sullivan is also an adjunct professor in the Centre for Māori Health at AUT University.
Prior to his work at Charles Sturt University, he was a senior teacher and research fellow at the University of Waikato[3] where he completed his PhD titled Faith, politics and reconciliation: the Roman Catholic Church, New Zealand Maori and indigenous Australians.
O'Sullivan's primary area of interest is the politics relating to indigenous peoples.