His research is in the intersection of database and Internet technologies. Yannis has published over fifty research articles in scientific conferences and journals, given tutorials at major conferences, and served on journal editorial boards and program committees for numerous international conferences and symposiums. He was the co-Chair of WebDB 2002, the co-Chair of XIME-P 2004, the General Chair of ACM SIGMOD 2003 and the Vice PC Chair for the "XML, Metadata and Semistructured Data" track of IEEE ICDE 2004.