He is also head of computer networks department at the technological institute, Villetaneuse. He has received a PhD degree in computer science from INPG France in 1998. He joined the INRIA as an expert engineer where he worked on designing and implementing recommender systems. His recent research work covers various topics such as link prediction and community detection in complex networks as well as multiplex and attributed network analysis. He is author of more than 150 papers in national and international venues. He has supervised 9 PhD studies and has been involved in organizing several conferences, workshops and tutorials mainly in the area of complex network analysis.