Konstantinos (Kostas) G. Margaritis was born in1960 at Veria, Greece and he grew up at Thessaloniki where he studied Electrical Engineering, at Aristoteleio Univeristy. After his graduation in 1983 he continued his studies under a scholarship from the Greek State Scholarship Fundation and he earned M.Sc. and Ph.D. degrees in Computer Science from Loughborough University, UK (1985 and 1988 respectively). After military service he was elected Lecturer in Informatics at University of Macedonia, Thessaloniki, Greece, where he continued his career as Assisatnt Professor (1992), Associate Professor (1994) και Full Professor (1998). Since 1994 he has established and directs the Parallel Distributed Processing Laboratory (PDP Lab), in the Department of Applied Informatics. He was founding member (1998-2004) of the Informatics and Telematics Institute, Center for Research and Technology. During 2000-2006 he was elected and served for two terms as Vice-Rector for Research, Development and Financial Planning, of the Univeristy of Macedonia. Further, during 2004-2006 he served as acting Head of the newly founded Department of Technology Management of the University of Macedonia at Naousa. Since mid-2008 he serves as board member of Hellenic Quality Assurance Agency for Higher Education (HQAA), responsible for the subject area of Applied Sciences and Informatics. He has been scientific coordinator or partner of over 20 Research and Development projects and he has been responsible for the EU Structural Funds projects of the University during 1996-2006. He has served as coordinartor and member of regional and national committees for ICT development. He is member of the editorial board and reviewer in several scientific journals and conferences, and he is member of the programm committees in many national ICT conferences. Together with his colleagues he is co-author of more than 200 technical articles published in international scientific journals and conferences. His current research interests include several aspects of Parallel and Distributed Processing, Internet Computations, Grid Technologies, Collaborative Computing, Intelligent Systems and Mobile - Ubiquitus Computation. Finally he uses and supports Linux and Free- Libre- Open Source Software.