The Royal Australian Army and Air Force Cadet Unit represents the oldest institution within the school and that of any state secondary school. Joining the Australian Army or Australian Air Force Cadet Corps provides a structured military programme that builds character, leadership, discipline, comradeship and initiative.
The Cadet Unit is highly regarded as the best unit in the southern region, regularly parading and partaking in official ceremonies such as Squadron Ceremonies and ANZAC Day. Students can be seen weekly around the South Yarra area, proudly wearing their military fatigues.
As a cadet, students learn new skills as they progress through structured training programs that include radio and signal work, navigation skills, first aid training, field engineering, physical training, survival skills and the proper handling of firearms. Senior cadets also organise camp and bivouacs where students abseil, rock-climb, canoe as well as other adventure activities.