An expert on the OECD and UNEP, he is a member of the scientific councils of the Fonds Français pour l’Environnement Mondial (French Global Environment Facility) and the Prince Albert II of Monaco Foundation.

He was coordinator of the United Nations Mediterranean Action Plan (based in Athens) from 1994 to 2003. He led the Cabinet of the French Minister of the Environment, Brice Lalonde, then prepared the national environment plan from 1988 to 1992.

He was adviser to the French Prime Minister on environmental issues from 1976 to 1978, responsible for spatial planning issues, sites and landscapes at the Ministry of Environment (1978-1984), then director of the research department at the Ministry of Environment (1984-1988). He chaired the Plan Bleu, and founded and chaired the Association du Domaine du Rayol.

He studied law, sociology and political science before attending the Ecole Nationale d’Administration (1966- 1968).

He joined IDDRI in 2005.