He holds a PhD in Informatics from Athens University of Economics and Business, Greece and an MSc in Information Systems Engineering from UMIST, UK. He has been involved as a technical coordinator in a number of EU funded projects concerning knowledge management, data mining and Machine Learning. He has also coordinated several national R&D projects concerning data management and personalized delivery of information. He has authored more than 100 articles concerning text and graph mining and intelligent applications in social networks and the web and received more than 1600 citations. For more information visit: http://www.dit.hua.gr/~varlamis