He received the M.Sc. degree from the Georgia Institute of Technology in 1994 and the Ph.D. from the University Pierre et Marie Curie (Paris 6) in 1998. His research interests are in social and information networks, graph mining, privacy, mobile and wireless networking, and network traffic measurement and modeling. From 2007-2010, he was with the Nokia Research Center (NRC) in Helsinki, Finland, holding the positions of Laboratory Director, then of Head of a tech-transfer program focused on data mining, analytics, and machine learning. In addition, he served on Nokia's CEO Technology Council, a technology advisory group reporting to the CEO. From 2003-2007, he was an Assistant Professor at EPFL. From 1998 to 2002, he was a Senior, then Principal Member of Research Staff in the Networking and Distributed Systems Laboratory at AT&T Research in New Jersey.