Cyprien Mathié

Mr. Mathié represents states, public entities and private clients in international investment and commercial arbitrations as well as in international disputes. His areas of expertise include French arbitration law, French contract law and corporate law, as well as investment law and public international law.

Mr. Mathié has acted in proceedings under the main arbitration rules, including under those of the International Chamber of Commerce (ICC), the International Centre for Settlement of Investment Disputes (ICSID), the London Court of International Arbitration (LCIA) and the Court of Arbitration for Sport (CAS). He has represented clients in various sectors, such as mining, oil and gas and construction. He is notably part of the team defending an African State in two commercial arbitrations and one ICSID arbitration, with total amounts in dispute exceeding $25 billion.

In addition to his arbitration work, he also handles complex commercial litigation cases before French courts and represents States in inter-States disputes and public international law matters.

Mr. Mathié is a lecturer in Contract Law at the Sorbonne University and contributes to the Advanced International Business Litigation LL.M. program at the University of Paris-Est Créteil, where he delivers a seminar on Investment Arbitration.

He is listed on the Paris Bar’s emergency criminal defense panel, having qualified through a selective annual admission process.

Mr. Mathié holds a degree in private, public and international business law as well as a Master's degree in arbitration and international trade law from the University of Paris I Panthéon-Sorbonne. He also completed an exchange program at Columbia Law School, where he was a research assistant to Professor George A. Bermann. During his studies, he won the Concours d'Arbitrage International de Paris (CAIP) organized by Sciences Po Paris (2019).

Prior to joining Curtis, he completed various internships, including with the United Nations International Law Commission, the OHADA Common Court of Justice and Arbitration, the Major Litigation Department of Total S.A. and several international law firms in Paris and London. He also served as a law clerk to Judge Charles N. Brower and to arbitrator Carmen Nuñez-Lagos.

Affaires d’Etats: Practical Considerations When Defending States In International Arbitration

Affaires d’Etats Vol. 2 – Abusive Claims Against States and How to Fight Them

Affaires d’Etats Vol. 3 – Amplifying the Voices of Developing States in ISDS Reform

Swords and Shields—Navigating Current Trends in Enforcing Arbitral Awards