Argentine sociologist (1978) with a Master's degree (1981) and a Ph.D. (1990) in International Relations from The Johns Hopkins University School of Advanced International Studies in Washington, D.C. (USA). Currently (since July 2009) Professor of International Relations at Universidad Di Tella (Buenos Aires, Argentina). Former Professor at the Universidad de San Andrés (Victoria, Province of Buenos Aires, Argentina) from 1999-2008. Lived in Colombia for 18 years between 1981 and 1998. He was Associate Professor (1995-1998) at the National University of Colombia (Bogotá), where he was Senior Researcher at the Institute of Political Studies and International Relations (IEPRI). He was co-founder (1982) and Director (1987-94) of the Center for International Studies (CEI) of the Universidad de los Andes (Bogotá). He has published several books, essays and opinion articles on Argentine and Colombian foreign policy, on US-Latin American relations, on the contemporary global system and on drug trafficking, terrorism and organized crime.