Christos Papatheodorou is a professor of Information Systems for Libraries and Archives at the Department of Archives, Library Science and Museology, Ionian University, Greece and co-leader of the Database and Information Systems Group (DBIS), Digital Libraries and Electronic Publishing Laboratory of the same Department. He is also fellow researcher in the Digital Curation Department, Institute for the Management of Information Systems, "Athena" Research Centre, Athens, Greece. He holds a B.Sc. and a Ph.D. in Computer Science. His research interests include Evaluation of Digital Libraries and Information Services, Metadata interoperability, Web 2.0 technologies, Digital Preservation, Personalized access to Digital Libraries and Internet, User Modeling and Web Mining. He is Associate Editor of the International Journal of Metadata, Semantics and Ontologies and he was the Chair of the Steering Committee of the International Conference on Theory and Practice of Digital Libraries (TPDL), from September 2012 to September 2015 and the Chair of the Department of Archives, Library Science and Museology, Ionian University from September 2013 to November 2015. He has participated as keynote speaker, chair or programme committee member in international conferences as well as evaluator and researcher in several international R&D projects. Some of his papers have been awarded as best papers by international conferences.