Apart from his other research interests, Malcolm was the Principal Investigator for the Australian Gulf War Veterans’ Health Study and the Health Study of the Australian Veterans of the Korean War. He is also a co-investigator on the Peacekeeper Grant application and the proposed Longitudinal Health Study of Defence Force Personnel. Malcolm is a member of the Research Advisory Group of the Australian Centre for Posttraumatic Mental Health and a member of the Occupational Medicine Consultative Group for the Department of Defence. He is also an Associate Editor of the journal, Occupational and Environmental Medicine.