In the 2021 edition of Chambers Global, Three Crowns maintained a leading ranking for international arbitration, with four partners recognised individually for their exceptional work and skills, Constantine Partasides QCGaëtan VerhooselGeorgios Petrochilos, and Todd Wetmore. In addition, the firm maintains a leading ranking in public international law.

Chambers highlighted Three Crowns’ expertise in both international commercial and investment arbitration, particularly in Europe and Latin America, and the firm’s experience representing sovereign states and private sector heavyweights. The firm is recognised for its in-depth knowledge of arbitration disputes arising in the energy, natural resources, financial services, and construction sectors. A source notes the strength of Three Crowns’ “considerable expertise, deep knowledge of international law and the arbitration process, superb advocacy skills, and constant focus.”

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Constantine, a partner in the firm’s London office, is recognised in all major directories and publications. Chambers UK recently honoured him as a “Star Individual” in International Arbitration—one of only two lawyers with this ranking, he was named in the “Hall of Fame” for International Arbitration in the 2021 edition of The Legal 500 UK and has been ranked as one of the “Top 20” individuals in the world of commercial arbitration every year since 2011 by Who’s Who Legal.

Constantine is a co-author of the fourth, fifth, and sixth editions of the leading textbook on international arbitration, “Redfern and Hunter on International Arbitration.”


Gaëtan, a partner in the firm’s London office, has served as an advocate and arbitrator in many commercial and investment treaty arbitrations. These include many highly significant, widely reported matters with large financial recoveries at stake or novel legal issues involved. He is the immediate past Co-Chair of the IBA Arbitration Committee and was appointed to the ICSID Panel of Arbitrators by the Kingdom of Belgium.

Gaëtan has been ranked as a leading international arbitration practitioner in all major publications, including Chambers, PLC Which LawyerThe Legal 500, and Who’s Who Legal.


Georgios, a partner in the firm’s Paris office, has a broad practice covering inter-State, investment, and commercial disputes. He has represented States, international organisations, and private parties in more than 70 disputes; and is regularly sought out to act as co-arbitrator and presiding arbitrator. He has extensive experience leading cases in international arbitral institutions and inter-State courts and tribunals.

Chambers notes that Georgios “boasts considerable expertise in both investor-state and commercial arbitration.” He is recognised by The Legal 500 as a “Leading Individual” in international arbitration and by Who’s Who Legal as a “Global Elite Thought Leader” in arbitration.


Todd, a partner in the firm’s Paris office, has over 25 years of experience handling some of the most challenging and complex commercial cases, appearing as counsel or arbitrator in over 50 major international arbitrations across a wide variety of sectors, including construction, energy, technology, manufacturing, mining, and commodities. He recognised specialist in infrastructure and construction disputes and has acted for contractors and owners concerning design, defects, delays, and disruption in civil and facilities construction projects of all kinds.

Todd is recognised as a “Leading Individual” in international arbitration by The Legal 500 and by Who’s Who Legal as a “Thought Leader” in arbitration.


Three Crowns is a firm committed to excellence in international arbitration and international law. Founded by practice leaders with decades of experience across many different international firms, it is regarded as “one of the world’s premier arbitration practices.” Its clients—including Fortune 10 companies and sovereign states—entrust the firm with their most important disputes.

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