Three Crowns has maintained a band one ranking for international arbitration in the 2024 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 KCGeorgios Petrochilos KC, and Todd Wetmore have been individually ranked; Constantine has been recognised as a “Star Individual” for international arbitration, one of only two practitioners globally in this category.


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”.



In recognising him as a “Star Individual” in this year’s guide, Chambers describes Constantine as “a leading figure in the global arbitration space”, renowned for his “repeated success securing multibillion-dollar awards in highly complex disputes”. The guide also highlights his “notable credentials in handling ground-breaking investment treaty arbitrations and disputes under the scope of public international law”. 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 maintains a leading ranking in the guide, in which Chambers highlights that he has “a renowned practice representing clients involved in investor-state and commercial arbitrations” and “has led landmark arbitrations, obtaining high-value awards” for his clients. The guide also notes his experience sitting as an arbitrator on tribunals. 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 continues to be highly ranked and is considered to be a standout practitioner acting for clients “across commercial, investor-state and state-to-state disputes”. The guide also highlights that his capabilities are further enhanced by his ability to practise Greek, UK, and French law. 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 also maintains his leading ranking. Chambers describes his “impressive 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 has “an amazing ability to understand technical issues with the law and carries out killer cross-examinations”. 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.


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