Professor at the UAM Iztapalapa, Mexico (1981-1986), and at the UNICEN, Tandil, Argentina (1986-1991). From 1991 he is directeur d'études at the Ecole des Hautes Etudes en Sciences Sociales in Paris and from 2008, he's ICREA Research Professor at the Universitat Pompeu Fabra in Barcelona. Director of the project State Building Process in Latin America, Advanced Grant of the European Research Council under the FPT/7 2007-2013.
The construction of the Nation-State in Latin America during the nineteenth century is now my main field of interest. The role of the "regular" and "irregular" armed forces, the bureaucracy and the man of law was essential in this process. I am studying the question in a comparative framework that includes several countries in Latin America.