He received his Ph.D. degree from the University of Illinois at Urbana-Champaign in 1999. From Nov 1999 to May 2006, he was with the Networks Business, Motorola. From May 2006 to Nov 2010 he was a Research Fellow at the Hamilton Institute, NUIM, Ireland, following which he was a Senior Research Associate at Northwestern University until Sept 2011. His research interests include communication networks, social network analysis, queuing theory, mathematical immunology, information theory and applied probability.