John McMillan has been a member of the Law Faculty staff since 1983, and was appointed to the Alumni Chair in Administrative Law in 2000.

He teaches in the fields of administrative law and constitutional law. Prior to that, John was an Associate to a High Court Justice, a solicitor in private practice, a Principal Investigation Officer with the Commonwealth Ombudsman, was self-employed in public interest advocacy, and taught law at the University of New South Wales and the Australian Graduate School of Management. He has been a consultant to a number of government and parliamentary enquiries on aspects of public law, and was formerly a Consultant to the Government Services Group of national law firm, Clayton Utz.

John was appointed as Commonwealth Ombudsman in 2003. He is currently on leave.