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 – commercial law – 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;
• Weston Energy Pty Ltd v National Ceramic Industries Pty Ltd, 2025/00319748 (NSWCA) – commercial law – misleading or deceptive conduct – for the appellant – led by Jeremy Giles SC;
• Australian Prudential Regulation Authority v Eric Insurance Limited ACN 009 129 793, NSD1251/2025 (FCA) – insolvency/restructuring – winding up orders on just and equitable grounds – for the applicant – led by Gerald Ng SC;
• The Epoch Holdings Group Pty Ltd ACN 169 456 517 & Ors v David Katz, NSD527/2022 (FCA) – restraints of trade – for the second respondent – led by James Lockhart SC;
• Regal Funds Management Pty Ltd as Trustee for Regal Emerging Companies Opportunities Fund v John Park and Ben Campbell in their capacity as Receivers and Managers of Altus Renewables Ltd (Receivers and Managers Appointed) (in Liquidation), NSD1394/2024 (FCA) – commercial law – for the plaintiffs, fourth and fifth cross-defendants, fourth defendant and first-cross-defendant – led by Jeremy Giles 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.

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