Prof. Dr. Sergio Marchisio followed the Academic career as professor in several Italian Universities (Florence, Perugia). In 1997, he become full professor of international law at the University Sapienza of Rome. In the meantime, he was appointed Director of the Institute for International Legal Studies of the National Research Council (ISGI-CNR).
He is Director of the 2nd Level Master’s Degrees in “Space Institutions and Policy”, organized by Italian Society for International Organization (SIOI), ISGI and Italian Space Agency (ASI), and in “International Protection of Human Rights”, organized by Sapienza University of Rome and ISGI.
Since 2007 he is Chairman of the European Centre for Space Law (ECSL) at the European Space Agency (ESA). Member of the Italian delegation to the UNCOPUOS, he served as Chairman of the Legal Subcommittee (2004-2006). Representative of the Italian government in a number of international conferences, he acts as Legal Expert of the Ministry of Foreign Affairs.
From 2002 to 2011 he chaired the Committee of Governmental Experts entrusted to negotiate the UNIDROIT Space Assets Protocol to the 2001 Cape Town Convention on International Interests in Mobile Equipment.
In 2006, he was appointed UNDP Senior Technical Advisor for the Project “Legal and Institutional Framework Project (LIFP). Egyptian Italian Environmental Cooperation Program Phase II. Strengthening the Institutional and Legal Framework of the MSEA/EEAA. Legislation on Solid Waste, Marine Environment, Protected Areas, Capacity Building.
Legal expert of the Italian Ministry of Foreign Affairs to the CODUN Space of the European Union’s Council. In 2010, he has been appointed as Member of the Task Force of the European External Service of the European Union (EEAS-EU).
Since 2001 he is Secretary General of the Italian Society of International law. Member of the Italian Section of the International Commission on Civil Status of Strasbourg (CIEC); Correspondent Member of the International Institute for the Unification of Private Law (UNIDROIT); Member of the Managing Council of the Italian Society for International Organization (SIOI).
He is member of several international societies dealing with space matters and international law: Member of the Board of Directors of the International Institute of Space Law (IISL), Full Member of the International Academy of Astronautics (IAA), Member of the Académie de l’air et l’espace (ANAE), Member of the International Law Association, Diplomatic Protection Committee and Space Law Committee (ILA). Member of the French Society of International Law and the American Society of International Law; Member of the International Association for Water Law; Italian Correspondent of the TMC Asser Institute, The Hague.
He is Italian delegate in a number of international conferences such as The UN Conference on Environment and Development (UNCED): Preparatory Committee (Geneva, New York, 1990-1992) and Final Conference (Rio de Janeiro, 1992); The UN Diplomatic Conference of Plenipotentiaries on the Establishment of an International Criminal Court (Rome, 1998); the Conference of the Parties of the Law of the Sea Tribunal (New York).
He is author of more than 100 publications in International Law, European Union Law, Law of International Organizations.
He is the author of the chapter on Article IX of the Outer Space Treaty (Volume I).