He was at the National Centre of Scientific Research (CNRS) from 1963 until 1970. He was head of the physics department at the University of Constantine whilst Dr. Bentchikou was dean of the science faculty. ###>Il a travaillé au CNRS de 1963 à 1970 et dirigé le département de physique de l’université de Constantine alors que A. Bentchikou était doyen de la faculté de sciences.