 He was administrator and later Vice-president of MSF, Doctors Without Borders, from 1999 to 2003, and is currently President of Comede, the Health Committee for the Exiles since 2006.A public intellectual, he frequently intervenes in the media on issues related to his research such as immigration, asylum, discrimination, social justice, law and order policies.He regards the social sciences as a form of “presence to the world” and has developed a program on the public life of ethnography.