Andrew grew up on the family farm "Tarqua" near Harrow in Western Victoria, and attended Hamilton College as a boarder between 1972 and 1977. It was here that he developed a taste for caving, exploring the nearby Byaduk Caves network of lava caves, under the direction of his Chemistry teacher, accompanied by a few other close school friends. In 1988, he eventually went on to attempt a record cave dive in Pannikin Plains Cave on the Nullarbor Plain, where flash floods turned the expedition into a life-or-death adventure. This was captured on film by his support team, and eventually published as Nullarbor Dreaming. This short film launched his career as an international film-maker and culminated in him becoming James Cameron's right-hand man on many 3D and other film projects. Sanctum was inspired by his Nullarbor experience.