After an undergraduate degree in Biochemistry and a residency in Paediatrics, he completed a PhD in mitochondrial biology, under the supervision of Dr Pierre Rustin at the University of Paris Descartes. He then was a post-doctoral fellow at Dr Jerry Vockley’s laboratory at the University of Pittsburgh, USA. His clinical research interests include mitochondrial energy metabolism, CDG and homocystinurias/ B12 and folate metabolism disorders for which he is a partner in the European collaborative network (EHOD). His basic research interest is mitochondrial energy metabolism. He has been appointed Honorary Secretary of the SSIEM (Society for the Study of Inborn Errors of Metabolism) in September 2016.