1967-71 : ENS. 1970 : DEA Astrophysics. 1971-78 : responsible for the High Energy Astrophysics prog., CNES. 1978-83 : responsible of space astronomy prog., CNES. 1983-84 : programme manager for the Gamma Ray astronomy prog. SIGMA. 1984-88 : head of the CNES Scientific programme division. 1988-89 : head of the International Affairs Division, CNES. 1989-93 : responsible of the sub-directorate "Sciences de l'univers", CNES. 1993-95 : responsible for the programme of space science, CNES. 1995-97 : assistant director, in charge of R&D prog., CNES. 1997-2001 : deputy director at the INSU (Institut national des sciences de l'univers), CNRS. Since 2001 : deputy director for Strategy and programme at CNES.