He is the Founder of the Black Dog Institute, an organization based at the Prince of Wales Hospital in Randwick, New South Wales, that focuses on the treatment of mood disorders, in particular clinical depression and bipolar disorder.
Past positions have included:
- Head, School of Psychiatry, University of New South Wales, 1983-2002
- Director of Division of Psychiatry, Prince of Wales Hospital and Prince Henry Hospital
- Part-time Research Director, Institute of Mental Health (Singapore), 1998-2002
- Member, International Advisory Board of the DSM-IV Task Force for Mood Disorders, and Personality Disorders
- Member NSW Guardianship Board, and NSW Administrative Appeals Tribunal
Professor Parker is a leading critic of the current unitary classification of major depressive disorder in the current DSM IV-TR paradigm, and has proposed the revival of the old diagnosis of melancholia. Professor Parker is the Peer Review Consultant to The Lawson Clinic, an independent world first depression & bipolar clinic which has adopted the Black Dog Institute's sub-typing Model of Depression.
See also 
- http://notes.med.unsw.edu.au/PSYCHWeb.nsf/page/showpersonlist?OpenDocument&staffid=7401443 UNSW Position Details
- Officer of the Order of Australia
- ISI Web of Knowledge
- Barrett, R (17 March 2010). "Push for melancholia to be listed as illness". abc.net.au. Retrieved 18 March 2010.
- The Lawson Clinic
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