Born in Thessaloniki, Greece, in 1974. Studied Physics at the Physics Dept. of the Aristotle Univ. of Thessaloniki and received his degree in 1996. Had his M.Sc. at the field of “Environmental Physics” in 1998 at the same department and commenced with his Ph.D. Thesis in the field of Atmospheric Dynamics “Stratosphere-to-Troposphere Exchange with the use radionuclides and ozone” obtaining his diploma in 2003. Conducted parallel research within the activities of the Laboratory of Atmospheric Physics and the Environmental Radioactivity Group at the Physics Dept. Worked as Post Doctoral fellow at Max Planck Institute (Biogeochemistry Dept.) during the period 2001-2002 in the field of Aerosol Science, and then moved to the Environmental Chemical Processes Lab of the University of Crete (2004-2006) conducting research on the variability of aerosols and trace gases at remote-marine environments. Employed at the National Observatory of Athens in 2006 as Senior Researcher. Promoted to Research Director in 2011. He leads the Institute’s Atmospheric Physics and Chemistry Group (APCG), and is the Head and Quality Manager of the Atmospheric Chemistry Laboratory. He is also the Director of the Greek GEO Office, and represents Greece in relevant international committees (eg member of the Council of the UN Group on Earth Observations (GEO), member of the EU EuroGEOSS Coordinating Committee), and member of the Council of the Hellenic Organization for Quality Assurance and Certification in Higher Education (ADIP). Finally, he is a member of the Steering Committee of the novel International Environmental Observatory of Navarino in Messinia, as well as editor of the journal Atmospheric Chemistry and Physics (IF: 5.5, EGU / Copernicus).