Iraklis Varlamis is an Associate Professor in Data Management at Harokopio University of Athens and an external associate of GRNET S.A. 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 co-ordinated several EU and National R&D projects concerning data management and personalized delivery of information. He has authored more than 170 articles concerning text and graph mining and intelligent applications in social networks and the web and received more than 2800 citations. In his recent collaboration with GRNET S.A. he has the technical lead of the architecture for the National Registry of Services.