Harrison accepts briefs in criminal, quasi-criminal and family law matters. He also accepts briefs in disciplinary and regulatory matters, and appears in all metropolitan and regional courts.

Before coming to the Bar, Harrison was an Associate to Her Honour Judge Ellis, who sits within the criminal division of the County Court of Victoria. In this role, Harrison was exposed to a broad range of criminal and regulatory proceedings including jury trials, plea hearings, bail applications and appeals.

Harrison is reading with David Cronin and his senior mentor is Neill Hutton SC.