Peter joined the army in 1966 and first served in Vietnam, at age 19, from May 1967 to June 1968. He was one of Australia's first tracking dog handlers and wrote of his experiences in his book Trackers. After two years as a dog trainer with the Army's Tracking Unit in Sydney Peter served a second tour in Vietnam from Feb 1971 to Oct 1971. He left the army in 1972 and was a reporter for Adelaide’s Sunday Mail for 25 years. Peter also wrote Flashback, Crossfire & Shockwave.
During his post-war service life Peter became an active member of the Vietnam Veterans’ Federation and as a Federation education officer launched a program in state high schools.
Through the SA History Teachers Association he now regularly speaks to students studying Vietnam history. He also talks on a frequent basis to canine clubs and associations on the role that tracking dogs played in the Vietnam War and their role today.
He is a founding member of the Australian Army Trackers And War Dogs Association.