Badger was trained at Adelaide, and shortly after serving as a resident medical officer at the Royal Adelaide Hospital decided to go to England. He held appointments at Poplar Hospital for Accidents in East London and later resided at 40 Poulton Square. After obtaining the Fellowship in 1957, he became resident surgical officer in the Croydon group of hospitals. He returned to Australia to become clinical assistant to the Department of Surgery at his old hospital, an appointment he held till his untimely death in July 1966. He had practised at 19 Devonshire Street, Walkerville, South Australia.