Vasilis Vassalos is an Associate Professor in the Department of Informatics at the Athens University of Economics and Business. Between 1999 and 2003 he was an Assistant Professor of Information Technology at the NYU Stern School of Business. He has been working on the challenges of online processing of data from autonomous sources since 1996. He has published more than 35 research papers in international conferences and journals, holds 2 US patents for work on information integration, and regularly serves on the program committees of the major conferences in databases. In 2000, he was a co-founder and CTO of Enosys Software, a pioneering data integration company acquired by BEA Systems (now Oracle Corp). He has led a number of publicly-funded research projects in the areas of online distributed information processing. Ηe was a Marie Curie Outgoing International Fellow in 2007-2008 visiting UCSD. His paper "Double Index NEsted-Loop Reactive Join for Result Rate Optimization," co-authored with M. Bornea, Y. Kotidis, and A. Deligiannakis, received the Best Student Paper award at the IEEE ICDE 2009.