Jean Paul is a doctor of Medicine and doctor of Paris Descartes University.

He is a University professor - hospital practitioner (PU-PH).

He is the director of the medical genetics Federation and a member of the molecular genetics department of GH Necker-Enfants malades.

He is the responsible for the coordinating site of the CRMR "mitochondrial diseases : from child to adult" (CARAMMEL).

He is a member of the research team "mitochondrial diseases" (directed by Dr Agnès Rötig) in the Imagine Institute.