Kostis Kyzirakos was a researcher in the Department of Informatics and Telecommunications, University of Athens. He received his Diploma in Engineering from the School of Electrical and Computer Engineering, NTUA, Athens. He has participated in projects funded by the European Commision (Ontogrid, SemsorGrid4Env, TELEIOS) and the Greek General Secretariat for Research and Technology (P2P Techniques for Semantic Web Services). He is one of the main developers of the semantic geospatial DBMS Strabon that was developed in the context of the EU projects SemsorGrid4Env and TELEIOS. In the same context, he studied and proposed how to represent and query geospatial data in the Semantic Web, published various geospatial datasets as linked geospatial data and implemented applications combining these data with previously published linked geospatial data. His current research focuses on modeling and querying semantic spatio-temporal information on top of traditional DBMS. He has given a tutorial on building semantic sensor webs and applications at ESWC 2011.