He saw active service attached to the 2/7 DEO Gurkha Rifles in Sabah and Sarawak during Indonesian Confrontation and with the 8th Battalion, Royal Australian Regiment in Vietnam where he was Mentioned in Despatches.

Graham has been for many years the Honorary Research Officer of the Vietnam Veterans Federation of Australia an organisation dedicated to the welfare of sick and disabled veterans and their families. 'We have always known,' he says, 'that families often pay a high price for the millitary service of the veteran, but we need more research if we are to develop effective remedies'.