Ryan has a comprehensive trial and appellate practice, representing clients at all levels. He was Counsel Assisting the then Commonwealth Solicitor-General (Justin Gleeson SC) and advised successive Commonwealth Attorneys-General during the COVID-19 pandemic.

Ryan is also a University Medalist in Law, a former High Court Associate, and has postgraduate degrees – BCL (Distinction) and M Phil in Law – from the University of Oxford. His commercial experience includes working in international disputes practices in London (Skadden, Arps, Slate, Meagher & Flom LLP) and Paris (Freshfields Bruckhaus Deringer).

Notable recent matters as counsel include:

* Kain v R&B Investments Pty Ltd as trustee for the R&B Pension Fund & Ors ("Blue Sky"), S146/2024, High Court of Australia – class actions and common fund orders – for the intervener – led by Craig Lenehan SC;

* Petersen Energia Inversora S.A.U. & Ors v Argentine Republic, 2024/0089582 NSWSC (Eq Div) – recognition and enforcement at common law of a US SDNY judgment worth USD $16.1 billion plus post-judgment interest – for the plaintiffs – led by Justin Hogan-Doran SC and Chester Brown SC; and

* Pauline Hanson v Mehreen Faruqi, NSD1698/2024, FCA (Full Court) – constitutional law – for the appellant – led by Sue Chrysanthou SC and Perry Herzfeld SC.