M.Sc. (1991), Ph.D. (1996) in Electrical and Computer Engineering, National Technical University of Athens (NTUA). Assistant Professor of geo-information systems, school of Surveying Engineering, NTUA. His research interests include distributed and heterogeneous architectures for geo-information systems, integration of environmental simulation and operational optimization for natural hazards and industrial accidents, wireless sensor networks of high spatial density, open data, crowd-sourcing, and multi-dimensional web and spatial analytics. Head of research projects in natural hazards management, in-situ wireless sensor networks, integrated operational logistics, and contingency planning for industrial accidents. Involved in curriculum design and teaching of graduate and post-graduate courses of programming, databases, software engineering, algorithms and distributed systems. He is among the referees of the international journals "IEEE Transactions on Software Engineering" and "ACM Transactions on Software Engineering and Methodology". Authored more than 70 articles in journals, conferences and books. Member of IEEE, ACM and the Open Knowledge Foundation.