Nikos Papageorgiou holds a Diploma degree in Electrical and Computer Engineering (1998) and an MSc on “Engineering-Economic Systems” (2007) from the National Technical University of Athens, Greece. He also holds a Degree of Proficiency in English from Cambridge University and he is member of the Technical Chamber of Greece. He has worked as a software engineer and IT consultant for Intrasoft International SA (1998-2000), Planet Ernst & Young SA (2000-2002), Industrial and Financial Systems SA (2003-2005), and Space Hellas SA. Since 2005 he has been working for Hellenic Post as a Computer Engineer where he is responsible for the Data and Voice Network. He is currently a research engineer at the School of Electrical and Computer Engineering of NTUA. His current research interests include software engineering, knowledge management, semantic web, ontology-based modeling and collaboration services