Three Crowns has maintained a band one ranking in Chambers Global for international arbitration. In addition, the firm has maintained a leading ranking in public international law. Constantine Partasides KCGaëtan Verhoosel KCGeorgios Petrochilos KC, and Todd Wetmore have been individually ranked.


One client describes the team as being “a step above everybody else, especially in their writing and advocacy” and states that out of all the lawyers they use across the globe, Three Crowns is “the best”. The review highlights the firm’s 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.



In maintaining his band one ranking, Chambers notes that Constantine “is a leading figure in the global arbitration space. He is renowned for his representation of clients from the energy sector in complex high-value disputes”. 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 and is praised for having “a renowned practice representing clients involved in investor-state disputes”. 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” and noted for his “commercial arbitration work in the oil and gas sector”. 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 him as having an “impressive practice centred on complex construction arbitrations from European and African jurisdictions”. The guide also highlights his experience in “investment treaty and commercial arbitrations across the technology and energy sectors”. 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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