• LLB (Hons) University of Adelaide
• Admitted to practice in 1969
• Appointed Queen’s Counsel for South Australia in 1985
• Appointed Queen’s Counsel for the Northern Territory in 1988

• Awarded Member of the Order of Australia (AM) 8 June 2009 For service to the law and to the judiciary, to a range of professional associations, and to the arts community of South Australia

• 1996 - 2016: Judge, Federal Court of Australia (Adelaide) (2 September 1996 - 24 August 2016)
• 2011 - July 2016: President, Australian Competition Tribunal

• See: Ceremonial Sitting of the Full Court To Farewell the Honourable Justice Mansfield AM

• Australian Competition Tribunal - President (23 May 2011 - 2016)
• Australian Competition Tribunal - Acting President
• Australian Competition Tribunal - Deputy President
  
• Supreme Court of the Australian Capital Territory - Additional Judge
  
• Supreme Court of the Northern Territory - Additional Judge
• 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
• Chairman of the Third Party Premiums Committee (South Australia) from 1986-1996
• Counsel assisting the Commissioner, and later Commissioner of the Royal Commission into the State Bank of South Australia from 1991-1993
• Chair of the Graduate Diploma and Legal Practice Education Committee (since 2004).
• Chair of the Art Gallery of South Australia Foundation (since 2003)

Seven Network Ltd v News Limited [2009] FCAFC 166 (the C7 case)
Anti-competitive agreements; misuse of market power
Justice Mansfield dissented on the issue of 'purpose', preferring the views of the trial judge, Justice Sackville, to those of the majority.

ACCC v Baxter Healthcare Pty Ltd [2008] FCAFC 141 (11 August 2008) (AustLII)
Exclusive dealing; misuse of market power
Justice Mansfield and Justice Gyles each (separately) found that Baxter contravened ss 46 and 47 of the TPA

ACCC v Rural Press [2001] FCA 1065
Misuse of market power, Exclusionary provisions
Justice Mansfield presided as the Trial Judge in this case, which was ultimately appealed to the High Court.

More forthcoming

• 'Every time I find the meaning of life, they change it!'
  Competition Law Conference, Sydney, 21 May 2016
• Professional men, they have no cares: Whatever happens, they get their's
  19th Annual Workshop of the Competition Law and Policy Institute of New Zealand - Competition Law Issues for the Professions (3 August 2008)
• Opportunities and challenges: evidence in cases under the Trade Practices Act 1974
  Competition Law Conference 2008 (24 May 2008)
• Litigation under the Trade Practices Act 1974
  Speech to Law Society of South Ausralia, Trade Practices Conference, 22 May 2008