Dr. Dionisis Kehagias is a Senior Research Associate in the Information Technologies Institute of the Centre for Research and Technology Hellas (CERTH). He holds a Diploma and a PhD in Electrical and Computer Engineering, both from the Department of Electrical and Computer Engineering of the Aristotle University of Thessaloniki. His research interests include semantic Web technologies with emphasis on semantic web services, machine learning and software agents. During his PhD studies he and his colleagues won the first price in the 6th International Trading Agent Competition. Dr. Kehagias has substantial experience on both national and European research and development projects, as he has participated in totally twelve projects, both as a senior software developer/architect and a project manager. He has been teaching Software Engineering, Operating Systems and Computers, at the School of Engineering of the Democritus University of Thrace (2007-2008) and Aristotle University of Thessaloniki (2008-2009), from the position of Adjunct Lecturer. His is currently a member of the teaching staff for the Master in Web Science Programme of the Aristotle University of Thessaloniki.