He was the director of the United Nations Division for Ocean Affairs and the Law of the Sea in 1985.
Following graduation, he worked as a legal and financial advisor before joining the United Nations in New York in 1966.
He was also attached to the Legal Office of the French Ministry of Foreign Affairs as an expert in the Law of the Sea and was elected to the Finance Committee of the International Seabed Authority[6] in Kingston, Jamaica.
He has authored and co-authored more than fifty books and publications dedicated to the Law of the Sea and Ocean Affairs, including La Conference des Nations Unies sur le Droit de la Mer (Pedone, 1983), The UN Conference on Straddling Fish Stocks and Highly Migratory Fish Stocks as editor with Gunnar Schramm (Martinus Nijhoff, 1996) and Le Destin de l'Autorite Internationale des Fonds Marins (Pedone, 2002).
Currently, Jean-Pierre Lévy is a member of the Finance Committee of the International Seabed Authority, which is the organization through which 159 State Parties and the European Union administer the resources of the seabed and ocean floor beyond the limits of national jurisdiction.