Vice-Rector for Academic Affairs and Administration of the NTUA (2018-2019)
Co-chair of the Association of Geographic Information Laboratories in Europe (AGILE)
Dean of the NTUA School of Rural and Surveying Engineering (8 years)
Director of the NTUA Cartography Laboratory (15 years)
Director of the NTUA Geoinformatics Postgraduate Programme (17 years)
Vice President of the Hellenic Cadastral Agency (2004-2009)
Chair of Working Group II/6 –System Integration and Interoperability (2004-08) of the International Society for Photogrammetry and Remote Sensing
Member of numerous conference organizing/scientific/program committees
Editorial Boards member of scientific journals such as the ISPRS International Journal of Geo-Information an Open Access MDPI Journal, the Open Geospatial Data, Software and Standards journal by Springer Open, the Journal of Geovisualization and Spatial Analysis by Springer, the Semantic Web Journal, and the GISDISS series of dissertations in Geographic Information Science by IOS Press.