John Ronald Mansfield was appointed to the Federal Court of Australia in September 1996 and retired from that position in 2016. 

He graduated in Law from the University of Adelaide with Honours and was admitted as a practitioner in 1969. The Honourable John Mansfield was appointed Queen’s Counsel for South Australia in 1985 and Queen’s Counsel for the Northern Territory in 1988. He was President of the South Australian Law Society 1988-1989, President of the Law Council of Australia from 1993-1994, Chairman of the Legal Aid Committee for the Law Council of Australia from 1986-1994, Chairman of the SA Legal Services Commission 1995-1996 and Chairman of the Third Party Premiums Committee (South Australia) from 1986-1996. During 1991-1993 The Honourable John Mansfield held the role as Counsel assisting the Commissioner, and later was Commissioner of the Royal Commission into the State Bank of South Australia. The Honourable John Mansfield was also Chair of the Graduate Diploma and Legal Practice Education from 2004-2011