Simmons & Simmons

Jonathan is a Managing Associate in the firm’s Disputes & Investigations team in London. His practice focuses on acting for clients on high-stakes civil disputes and regulatory investigations, often spanning multiple jurisdictions.

Jonathan has experience advising clients on complex technology disputes and regulatory investigations. He has advised on contentious issues concerning software licences, telecoms equipment, IT services, outsourcing arrangements, digital assets (including cryptocurrency and utility tokens), and artificial intelligence (AI). Jonathan is one of the firm’s AI specialists, and has advised some of the world’s largest companies on the legal and ethical issues relating to AI, including compliance with the EU AI Act, AI governance, and responsible AI.

Jonathan has considerable experience in both commercial and investor-state arbitration, as well as related proceedings in the English courts. He has acted in and advised on arbitrations under a range of procedural rules including ICC, LCIA, and UNCITRAL, and has acted for both investors and states in relation to the enforcement of ICSID awards. Jonathan also regularly advises on public international law issues. He is a qualified Solicitor Advocate, and has appeared in both commercial and investment arbitration hearings. He is listed as a 'Leading Associate' for International Arbitration by Legal 500 (2024).

Jonathan also has experience in English High Court litigation. Two of his cases have been featured in The Lawyer’s Top 20 cases, both of which resulted in successful outcomes for his clients at trial.