Adrian d'Hagé was educated at North Sydney Boys High School and the Royal Military College Duntroon (Applied Science). Graduating into the Intelligence Corps, he served as a platoon commander in Vietnam, where he was awarded the Military Cross. His military service included command of an infantry battalion, director of joint operations and head of defence public relations. In 1994 Adrian was made a Member of the Order of Australia. In his last appointment, he headed defence planning for counter terrorism security for the Sydney Olympics, including security against chemical, biological and nuclear threats.
Adrian holds an honours degree in theology, entering as a committed Christian but graduating 'with no fixed religion'. In 2009 he completed a Bachelor of Applied Science (Dean's Award) in oenology or wine chemistry at Charles Sturt University, and he has successfully sat the Austrian Government exams for ski instructor, 'Schilehrer Anwärter'. He is presently a research scholar, tutor and part-time lecturer at the Centre for Arab and Islamic Studies (Middle East and Central Asia) at ANU. His doctorate is entitled 'The Influence of Religion on US Foreign Policy in the Middle East'.