Professor Alain Pellet taught Public International Law at the University Paris Nanterre where he was Director of the Centre de Droit International between 1990 and 2001. Member of the Institut de Droit International of which he currently is the President and honorary President of the French Society for International Law, he is the author or co-author of several books (including the leading treatise in Frenchin the field and the General Course of the Hague Academy) and numerous articles in public international law and investment law. From 1990 to 2011, he was a member of the United Nations International Law Commission and acted as Chair in 1997.

He has been Counsel for numerous governments and for international organisations. He has acted as counsel and advocate in more than 60 cases before the International Court of Justice, the International Tribunal for the Law of the Sea, as well as in various arbitrations, in particular investment cases.

He has been nominated by the French Government to the List of arbitrators under Annex VII of the United Nations Convention on the Law of the Sea and to the Panel of Arbitrators of the ICSID by the Chairman of the Administrative Council (from 2011 to 2017) and has been appointed arbitrator or president in several investment cases.

He also acted as expert to the Arbitration Commission of the Peace Conference on the former Yugoslavia, and as Rapporteur of the French Committee of Jurists on the Creation of an International Criminal for Former Yugoslavia at the origin of the project of creation of the International Criminal Tribunal for the former Yugoslavia. He was the Legal Adviser of the World Tourism Organisation (1990-2016) and the Independent Objector of the Internet Corporation for Assigned Names and Numbers for generic top level domain names (new gTLD) (2012-2015).