Matthieu Gregoire practices international arbitration, commercial dispute resolution and public international law. He is nominated in the Legal 500 Bar Awards for International Arbitration Junior of the Year 2022.
Since joining the Bar, Matthieu has:
Prior to joining the Bar, Matthieu qualified as a New York attorney in 2011 and worked as an associate in the international arbitration team of Cleary Gottlieb, Steen & Hamilton, in Paris and as a consultant for the World Bank.
“He has an extraordinary legal mind and he has excelled in advocacy. Technically he is very sound, and he understands the legal principles that apply and applies them in a way that is compelling.” – Chambers and Partners, 2022
“Knowledgeable and personable. He is easy to work with and can work seamlessly across various co-counselling arrangements. Being fluent in French gives him a further edge over his colleagues.” – Legal 500, 2022
“Very smart, hard worker, perfectly bilingual (English/French), and also very personable.” – Legal 500, 2020
Matthieu practices investment treaty arbitration and international commercial arbitration, often in proceedings with an English law element (whether as the governing law of the contract or the proceedings), either led or as sole counsel. Matthieu also appears in arbitration-related proceedings.
Matthieu has built on his experience as an attorney in the Paris office of Cleary Gottlieb, Steen & Hamilton, where he acted in investment treaty and commercial arbitrations, and as a consultant for the World Bank, where he advised States and Chambers of Commerce on the creation of arbitration and/or mediation laws or centres and the reform of investment law.
Matthieu combines his practice with the role of adjunct professor of law (international commercial arbitration) at Pepperdine Law School, University of Malibu (London Campus). He publishes widely in the area and regularly contributes to conferences or talks.
Featured International Arbitration cases
Matthieu represents clients in commercial disputes including those concerning business investments, the sale and supply of goods and services, complex civil fraud, as well as claims claims raising issues of conflicts of laws or international enforcement. Matthieu has experience of county courts, the High Court, foreign jurisdictions and international tribunals.
Featured Commercial cases
“He’s an incisive, reliably hard-working barrister who was a solicitor for a number of years in France.” “He’s bilingual and has the ability to handle proceedings both in English and French.” – Chambers and Partners 2022
“An absolutely fantastic advocate – responsive, accessible and a corner stone of any team.” – Legal 500, 2022
“He is a pleasure to work with, very able, hard working and dedicated. In addition to being dual qualified (France and England), he speaks and writes in both French and English to a native standard.” – Legal 500, 2021
Matthieu practices international investment treaty arbitration and international public law, with a particular interest in international economic law. He acts for claimants and respondents in cases under a variety of rules, in particular ICSID, SCC, UNCITRAL, as well as in arbitration-related court proceedings.
Matthieu was appointed to the Attorney General’s Public International Law C Panel of Counsel in 2017.
Featured Public International Law cases
Matthieu is developing experience in Trade Law and European Law with a particular focus on matters relating to Brexit. He maintains a keen interest in WTO and international trade law, having recently presented a paper at the Annual Conference on WTO Law in Geneva titled “The Legal Consequences of Brexit on Investment Protection: Disentangling a Complex Web and Spinning a New One” and published an article on “Remedies in investment treaty arbitration and WTO law: complementary systems?” in the Journal of International Banking and Financial Law.
Featured Trade Law, European Law & Brexit cases
Matthieu is developing his practice of construction law, notably in the arbitral and adjudicative context. Matthieu particularly enjoys working closely with engineers, architects and construction professionals.
Featured Construction cases
In line with Chambers’ expertise in this area, Matthieu has experience of a range of professional liability disputes.
Featured Professional Liability cases
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