Harrison practises in the areas of commercial law, property law, planning and environmental law, public law, and professional negligence in the NSW Court of Appeal, Supreme Court, District Court and Land and Environment Court.

Some of his recent appellate appearances include Billyard Ave Developments Pty Limited v The Council of the City of Sydney [2025] NSWLEC 22 (led by A Galasso SC), Lahoud v Willoughby Council [2024] HCASL 287 (led by B Walker SC), Narraport Woollahra Holdings Pty Ltd v Ice Box Liquor Pty Ltd [2024] NSWCATAP240 (led by J Emmett SC) and Ausbao (286 Sussex Street) Pty Ltd v Registrar General of NSW [2023] NSWCA 18 (led by G Sirtes SC).

Harrison is recognised for his experience and expertise in the Land and Environment Court’s development appeals (Class 1), compulsory acquisition (Class 3), and administrative law (Class 4) jurisdictions. He also appears in the Land and Environment Court’s s 56A appeal jurisdiction: e.g., LFD Homes Pty Ltd ATF The LFD Homes Unit Trust v The Council of the City of Sydney [2025] NSWLEC 145 (led by A Galasso SC) and Canterbury-Bankstown Council v Hamptons Property Services Pty Ltd [2025] NSWLEC 41 (led by P Tomasetti SC).

Harrison is often briefed to advise and appear in complex commercial and property disputes and has acted for clients such as Telstra, Lendlease, the NSW Biodiversity Conservation Trust, Orica Australia, Growthbuilt, SHOKAI Ausbao and Sydney Metro.

His practice also involves regulatory, administrative law and judicial review matters for applicants (e.g., Commissioner of the AFP v HWCJ GLB Pty Ltd(No 2) [2024] NSWSC 482 led by J Giles SC) and government clients: e.g., Secretary, Department of Health v Peptide Clinics Australia Pty Ltd [2019] FCA 1107 led by N Sharp SC.

Harrison is also often engaged to advise and appear in professional negligence causes for and against legal practitioners: see, e.g., Johnson v Firth [2021] NSWCA 237 led by W Fitzsimmons SC and Bartier Perry Pty Ltd v Paltos [2021] NSWCA 158 led by J Emmett SC.

Before coming to the Bar in 2016, Harrison worked in international arbitration in Singapore for Freshfields Bruckhaus Deringer (focusing primarily upon investor-state and treaty disputes) and in Paris for Allen & Overy (on large-scale commercial claims).  He was Tipstaff to the Honourable Justice R I Barrett of the New South Wales Court of Appeal.  He was also a contributor to Robson’s Annotated Corporations Legislation.

Harrison holds a Juris Doctor (Dist) and a Bachelor of Arts (Hons I) from the University of Sydney.  He taught Civil and Criminal Procedure at Sydney Law School and worked there as a researcher.  He studied on exchange at Sciences Po, Paris (a prestigious political sciences university in France) and speaks French.

He is a member of the NSW Bar Association’s Climate Change Committee and an avid surfer.

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