Osvaldo Marsico earned a degree in law from the University of Buenos Aires in 1981 and graduated from the Institute of Foreign Service of the Ministry of Foreign Affairs, International Trade and Worship of Argentina, in 1985, becoming a career diplomat.
His first foreign posting was at the Embassy of the Argentine Republic to the USA (1987-’93), where he also earned his Master’s Degree in International Law from Washington DC’s Georgetown University in 1991. He returned to the U.S. from 1996-2003, serving in Argentina’s permanent mission to the United Nations in New York, after which he returned to the Ministry and was ultimately appointed Deputy Legal Advisor (2006-’08).
He next travelled to the UK, serving (2009-’12) as Chargé d’affaires (a.i.) of the Embassy of the Argentine Republic to the UK and Deputy Permanent Representative of the Argentine Republic to the International Maritime Organization. After spending a year (September 2012-December 2013) in Brussels as Chargé d’affaires (a.i.) of the Embassy of the Argentine Republic to the EU, he returned to Buenos Aires to take on the posts of Deputy President of the National Commission on the Outer Limit of the Continental Shelf of the Argentine Republic (2014-’16) and National Director of the Malvinas and South Atlantic Islands Department (2016-’20).
He has been a Member of the Consultative Council on South Atlantic Affairs since January 2021 and was appointed ambassador to Serbia in October 2021. A visiting professor of international law since the year 2000, alongside his native Spanish, Ambassador Marsico also speaks English and French.