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FR-75014 Paris
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Founder & Managing Partner 

Professor at Sorbonne University 

Attorney at Paris Bar

Tel.: + 33.620.47.08.65




Thomas Clay is a full-time Professor (agrégé) of Law at the University of Sorbonne (Paris 1 University), where he teaches notably arbitration law and alternative dispute resolution.


Previously, he founded and directed the Master of Laws in Arbitration and Business Law at the University of Versailles (Paris Saclay University) for 12 years. At this University, he was Vice-President and Dean of the Faculty of Law. 

Enjoying a strong and recognized expertise in domestic, international and investment arbitration, he has participated in more than one hundred arbitral proceedings, as chairman, sole arbitrator or co-arbitrator in domestic or international arbitrations, ad hoc or institutional, in different sectors such as energy, telecommunication, construction, distribution, international trade, sports law, labor law, etc., under the aegis of many different arbitration centers including the International Chamber of Commerce (ICC), the International Center for the Settlement of Investment Disputes (ICSID), the London Court of International Arbitration (LCIA), the Stockholm Arbitration Chamber (SCC), the Permanent Court of Arbitration (PCA), the Milan Chamber of Arbitration (CAM), the Court of Arbitration for Sport (CAS), the Paris Mediation and Arbitration Center (CMAP), the International Arbitration Chamber of Paris, etc.


He was appointed by France as co-arbitrator in the first ICSID arbitration case against France and he currently serves on other ICSID arbitral tribunals. He has also developed a specific competence in sports law. He is notably on the list of arbitrators of the CAS.


Member of the Paris Bar, Professor Thomas Clay advises and represents States, French and foreign companies before arbitral tribunals and States Courts.

Thomas Clay works in French, English, Spanish and Italian. 

Curriculum vitae on current or past cases: upon request.



  • Trophy for Best Arbitrator 2011, awarded by the magazine Decideurs and by the Paris Bar Association

  • Classified under the category « Excellent arbitre » by the magazine Decideurs, in 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 and 2018.

  • Ranked by the Global Arbitration Review among the French Arbitrators

  • Described by Who’s Who Legal 2015 as « high-qualified, reliable and efficient arbitrator » and by Who’s Who Legal 2016 as « skillful practitioner » with a « intimate understanding of French Arbitration Law »


  • Agrégé des Facultés de droit (section : droit privé & sciences “Agrégation” of Law (section: Private Law and Criminal Sciences)

  • Doctor of Law (LL.D.), University of Panthéon-Assas (Paris II)

  • Columbia Law School, New York (United States)

  • Postgraduate degree in Private International Law, University of Panthéon-Assas (Paris II)

  • Postgraduate degree in Business Law and Economic Law, University of Panthéon-Assas (Paris II)

  • Paris Bar School Admission Test

  • Master's degree in Private Law (specialization: judicial careers) and Master's degree in Business Law

  • Degree, Institute of Comparative Law Degree, University of Bologna (Italy)



  • Vice-Chairman of "Paris, place of arbitration"

  • Associate Member of the Institute of the International Chamber of Commerce

  • Co-founder of "Parigi Italia Arbitrato"

  • Member of the "Sorbonne Justice" research department

  • Co-director of the research department "Sorbonne Sport Law"

  • Member of the International Arbitration Institute

  • Member of the International Association of Judicial Law

  • Member of the American Association of Private International Law

  • Expert from the French Institute of International Legal Experts

  • Member of the Institute of Expertise, Arbitration and Mediation

  • Member of the Advisory Committee of the European Court of Arbitration of Versailles

  • Member of the Advisory Committee of the European Court of Arbitration

  • Member of the Venezuelan Arbitration Committee


  • Vice-President of the National Centre for Labour Arbitration First

  • Vice-Chairman of the Scientific Council of the Arbitration Centre of the Franco-Arab Chamber of Commerce

  • Member of the Court of Arbitration of the Casablanca International Mediation and Arbitration Center

  • President of the Pre-constituted Arbitral Tribunal of the Paris Mediation and Arbitration Center (CMAP)

  • Member of the Board of Directors of the Family Dispute Arbitration Centre

  • Member of the Appeal Committee of the Professional Football League