John Robertson was admitted as a solicitor in 1973 and formed his own firm in 1978, which ultimately became Robertson O’Gorman. He was Deputy President of the Queensland Community Corrections Board from 1991-1994. In 1994, he was appointed as a District Court Judge. He served in Ipswich, Brisbane, and, for the last 16 years leading to retirement in 2018, at Maroochydore. He was a Judge of the Childrens Court of Queensland for his whole judicial career and President of that Court from 1999-2001. Throughout his career, he has written and lectured extensively on issues relating to sentencing and the criminal law, including restorative justice, sentencing law, advocacy and the criminal law and the media. He is the author of the Queensland Sentencing Manual which was first published in 1999. He is presently the Chair of the Queensland Sentencing Advisory Council and a part-time judicial member in the Misconduct Division of the Queensland Civil and Administrative Tribunal.