Three Crowns has maintained a Band 1 ranking for international arbitration in the 2025 edition of Chambers Global: Global Market Leaders. In addition, the firm has maintained a leading ranking in public international law. Constantine Partasides KC, Gaëtan Verhoosel KC, Georgios Petrochilos KC, and Todd Wetmore have been individually ranked amongst the global market leaders for international arbitration.
“MARKET-LEADING GLOBAL PRACTICE”
Chambers recognises Three Crowns as a “market-leading global practice”, emphasising the firm’s deep expertise in both commercial arbitration and investment treaty claims and the team’s experience in representing sovereign States and private sector heavyweights. The guide also recognises the team’s in-depth knowledge of disputes arising in the energy, natural resources and financial services sectors, as well as construction arbitration, with one client noting that the team has a “very good approach”.
“SKILLED AT HANDLING BOTH PIL AND INTERNATIONAL ARBITRATION”
CONSTANTINE PARTASIDES KC
Constantine is recognised as a “Star Individual” in the guide, in which Chambers highlights his “notable credentials in handling ground-breaking investment treaty arbitrations and disputes under the scope of public international law”. Sources note that Constantine is “one of the best advocates in the global arena”, that he has “the ability of oral advocacy that is really compelling”, and is “extremely client focused and strategic”. Constantine has appeared as counsel in some of the largest commercial arbitrations of the past decades and his broad practice includes inter-State and investment treaty disputes. He is a Member of the ICCA Governing Board, a Director of the LCIA Board, and has published extensively on international arbitration and international law.
GAËTAN VERHOOSEL KC
Gaëtan is recognised as Band 2 in this year’s guide, in which Chambers highlights that he has “an internationally acclaimed practice serving as an arbitrator and representing clients involved in investor-state and commercial arbitrations” and “has led landmark arbitrations, obtaining high-value awards” for his clients. Clients emphasise that Gaetan’s “capacity to grasp the big picture is unique” and that his work is highly “sophisticated and elegant”. Gaëtan has served as advocate and as arbitrator in numerous commercial and investment treaty arbitrations where significant financial recoveries were at stake or novel legal issues raised. He is a past Senior Co-Chair of the Arbitration Committee of the International Bar Association, a member of the SIAC Court of Arbitration, and was appointed to the ICSID Panel of Arbitrators by the Kingdom of Belgium.
GEORGIOS PETROCHILOS KC
Georgios continues to be highly ranked, with Chambers describing him as a “leading influential choice for clients seeking a robust skill set and considerable experience in international arbitration”. The guide also highlights that his capabilities are further enhanced by decades of experience, and that he has acted as counsel in ICC, SCC, ICSID, UNCITRAL, and LCIA rules commercial, investor-state and state-versus-state disputes. Georgios has a broad practice spanning more than two decades and covering inter-State, investment, and commercial disputes. He has represented States, international organisations, and private parties in more than 70 disputes, including several appearances in the International Court of Justice. Georgios has published extensively, including the well-known monograph Procedural Law in International Arbitration, and the leading commentary, UNCITRAL Rules.
TODD WETMORE
Todd also maintains his leading ranking. Chambers describes his “impressive global practice”, highlighting his “extensive experience and deep well of knowledge in investment treaty and commercial arbitrations, particularly across technical sectors such as technology, energy, construction and infrastructure”. One client notes that Todd is a “remarkable advocate and wordsmith both in his ability to transmit clear ideas to tribunals, build rapport and nail the central issues of a case”. Qualified in civil and common law, Todd has over 25 years of experience handling some of the largest and most complex commercial cases. He regularly acts as counsel in the oil & gas, technology, manufacturing, mining, and commodities sectors, and is a recognised specialist in infrastructure and construction disputes. Todd is a Vice-President of the ICC Court of Arbitration.