Specializes in network protocol design and evaluation.

He is an Assistant Professor at the College of Computer Science, Northeastern University, Boston. Previously, he was with the faculty of Computer Science at SUNY Stony Brook.

Professor Tsaoussidis is involved in the technical committees of IEEE TCCC, ACM SIGCOMM and SIGMOBILE and in the program committees of several conferences. He is on the editorial board of the International Journal of Wireless Communications and Mobile Computing, by Wiley, where he is also the guest editor of the 2001 Special Issue on "Reliable Transport Protocols for Mobile Computing".

He is also the guest editor of the Journal of Supercomputing on the issue "Design and Evaluation of Transport Services". Prof. Tsaoussidis was one of the first researchers that studied the energy/throughput tradeoffs of reliable transport protocols, a topic that has recently gained significant attention.

He has recently addressed these research issues in the context of wireless communications and mobile computing as invited panelist and speaker at various conferences, institutes and industries. Vassilis Tsaoussidis has published over 30 technical papers.