In the 2022 edition of Chambers Europe, Three Crowns maintained its position as a Band 1 firm for international arbitration. The firm also retained a leading ranking in the France section of the Europe guide.

Constantine Partasides QC, Gaëtan Verhoosel QC, Georgios Petrochilos QC, and Todd Wetmore have continued their ranking in the Chambers Europe guide with Todd, Georgios, and Kathryn Khamsi also ranked again this year in the Chambers France guide.


Chambers Europe describes the team as “globally renowned practitioners”, who offer “notable expertise”. One source states “I would not hesitate to appoint Three Crowns on a mission-critical arbitration” with another adding “I find the lawyers to be naturally pragmatic”. Interviewees emphasise the team’s “thorough understanding of the issues” and that they are “incredibly bright strategists”. In the France guide, clients report that “the firm and its lawyers are truly excellent; they are hard-working, intelligent, and extremely diligent”, adding that “it is always a pleasure to work with them”.



Constantine has maintained his band one status in the Chambers Europe rankings with market commentators identifying him as a “leading arbitration lawyer”. Interviewees highlight Constantine’s advocacy skills with one source noting “he is excellent with people, he has a really good approach and manner”. 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 Director of the  LCIA Board, and has published extensively on international arbitration and international law.


Gaëtan continues to be highly ranked in the Europe guide, which reveres him as “very much a prominent figure for arbitration” and “respected arbitration counsel”. 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 was recently appointed as Queen’s Counsel and is a Member of the SIAC Court of Arbitration.


Georgios also maintains a high ranking in both the Europe and France guides, receiving “strong praise from market commentators and clients for his technical expertise and for his communication skills”. Sources emphasise his “ability to grasp foreign law and his drafting skills”. 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.


Todd maintains a leading ranking in both the Europe and France guides, which highlights his “cross-examination skills and know-how in construction matters”, noting that he is “highly accomplished in handling high value energy and construction arbitrations”. 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.


Kathryn continues to be ranked in the Chambers France guide, in which clients report that she has “great enthusiasm for the resolution of disputes and is often coming up with new ways of tackling problems”. Kathryn acts for States and corporate clients in all types of disputes, including investment treaty and commercial. She is also on the ICSID Panel of Arbitrators.

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