Professor in the School of Electrical and Computer Engineering (ECE) at National Technical University of Athens. From 1995 to 1999, he was a senior technical staff member at AT&T Laboratories, New Jersey. In August 1999 he joined the ECE Department at the New Jersey Institute of Technology, USA, where he was an Associate Professor until 2004. He has an established record of publications in his field of expertise, with more than 300 technical journal and conference published papers. His main research interests lie in the area of computer communication networks, with emphasis on the analysis, optimization, and performance evaluation of mobile and distributed systems, wireless networks, and complex systems. He received the Best Paper Award in IEEE INFOCOM 94, the AT&T Division Recognition and Achievement Award in 1997, the US National Science Foundation Career Award in 2003, the Best Paper Award in IEEE WCNC 2012, the Excellence in Research Grant in Greece in 2012, the Best Paper Awards in ADHOCNETS 2015, ICT 2016 and IEEE/IFIP WMNC 2019, as well as the 2019 IEEE ComSoc Technical Committee on Communications Systems Integration and Modeling best paper award (for his INFOCOM 2019 paper). He also served on the board of the Greek National Regulatory Authority on Telecommunications and Posts from 2006 to 2009.