George Papastefanatos is a research associate at the Information Management Systems Institute of the Research Center ATHENA.His research interests lie in the area of big data management and analytics, related to the data web and linked data, data evolution and preservation, data integration, data flows and data warehouses, data quality, data visualization and visual analytics. George obtained the Diploma of Electrical and Computer Engineering and his PhD in Computer Science from the Department of Electrical and Computer Engineering of the National Technical University of Athens in 2000 and 2009, respectively.