jean is also a graduate from the paris diderot university in molecular biology, he started his career as assistant at the "collège de france" in the year 1990. in 1994, he became lecturer at the "université de versailles saint-quentin-en-yvelines". in 2001, he was appointed as the head of training at the "école pratique des hautes études" before entering in 2006 as teacher at the "université de versailles saint-quentin-en-yvelines". alongside his teaching activities, he is a researcher at the laboratory of genetics and cell biology, responsible of the "stress and cell death" team.