He started his career as a stunt man and stunt coordinator between 1965 and 1967 most notably for 50 episodes of The Avengers in 1965, but became gradually involved as a director for TV then film. Perhaps due to his background as a stuntman, his style of direction is often highly visual and physical with a great deal of movement.
His work as for TV includes episodes of The Avengers (on which he also performed stunts in many episodes), Space: 1999, The New Avengers, and V. He has also directed several television movies, including The Return of the Man from U.N.C.L.E..
In 1969 he also directed many episodes of the detective series Randall and Hopkirk (Deceased). Austin directed the 1972 film Virgin Witch, which has a minor cult following.