Patrick THIEFFRY

Patrick Thieffry
Independent arbitrator and consultant

Patrick Thieffry is an independent arbitrator and consultant, mainly in construction and infrastructure, environmental and energy-related matters. A member of the Paris and New York Bars, he practiced international business law for four decades, and has a wide experience of international transactions and transnational disputes. He has been acting as Counsel, Sole Arbitrator and President of Arbitral Tribunals since the 1980’s in the EU and the US.

He served as Co-chair of the ICC Task Force on Arbitration of Climate Change-related Disputes and as Head of the ICC Working Group on the Global Pact for the Environment and he co-edited the XXIst Dossier of the ICC Institute of World Business Law on 'Navigating the New Contents of International Public Policy: Compliance in Environment and Human Rights.'

Patrick Thieffry has been teaching environmental law since 1996 at the Sorbonne School of Law where he served as Associate Professor between 2008 and 2019 and in several other universities, including Paris 2 Panthéon-Assas where he also lectures on arbitration of environment and climate disputes. He authored a Handbook of European Environmental and Climate Law (Bruylant, 2nd ed. 2021, 489 pages), a Traité de droit européen de l’environnement et du climat (Bruylant, 4th ed. 2020, 1723 pages), a Manuel de droit européen de l’environnement et du climat (Bruylant, 4th ed., 2024, 550 pages) as well as other law books and many articles on international arbitration, business law, environmental and climate law.

Patrick Thieffry holds degrees in International Economics and in International Private and Business Law, he practiced in the United States for five years and he presented a PhD thesis on the Instruments of Environmental Law.