In 1926, Eric ASCHE (father of Austin Asche) was appointed Legal Assistant in the Crown Law Office, Department of the Government Secretary for the Territory of New Guinea. They departed from Sydney on 25 August, and the family spent a year in Rabaul. Eric then successfully applied for a job in Darwin, and the family sailed on the SS Marella, arriving on 18 February 1928. The family relocated from Rabaul, after a 1 year appointment of Austins father, to Darwin arriving on the 18 February 1928 on the SS Marella and lived at the Mud Hut (Knight's Folly) before it burnt down on the 31 December 1933. Eric Thomas Asche was one of a small number of lawyers in Darwin at that time and held the position of Crown Law Officer.
Austin Asche attended Darwin Primary School before returning to Melbourne in 1938 and attending Melbourne Grammar School. He joined the Royal Australian Air Force in 1944 and served until 1946. Upon discharge he attended the University of Melbourne and attained a Bachelor of Arts and a Master of Laws degree. He was admitted to practice on 1 February 1950.
Asche relocated to Brisbane and was admitted to practice there in February 1951. Upon returning to Melbourne in 1954 he practised at the Bar until 1975, eventually being appointed as a Queen's Counsel in 1972. He was a part-time lecturer at the Royal Melbourne Institute of Technology from 1968 to 1975.