Mark was a member of the NSWPF between 1994 and 2004. He spent two years as a general duties constable and the remaining nine years as a police prosecutor, working state wide with the North West Region.
After leaving the police force, Mark worked for a NSW law firm, specialising in Family and Criminal Law. He then spent some twelve years working as a criminal lawyer with the Aboriginal Legal Services in the Northern Territory and Western Australia.
Mark is also a qualified commercial pilot.