Justice Middelton was appointed a part-time Commissioner of the ALRC for a term of three years on 12 December 2012.
John Eric Middleton was appointed to the Federal Court of Australia effective from 31 July 2006.
He was appointed a Deputy President of the Australian Competition Tribunal effective from 16 February 2009.
He was appointed a presidential member of the Administrative Appeals Tribunal effective from 24 November 2010.