Nassos joined the Institute of Geography at CAU in 2008 and leads the CRSLR Research Group. He has a background in Surveying Engineering (MEng, NTU Athens) and Physical Geography(MSc, PhD,  King's College London) and has specialised in GIS and remote sensing. He worked one year in the industry and did his postdoc at the Flood Hazard Research Centre (Middlesex University) where he worked on the DINAS-Coast and Atlantis projects. Before joining CAU he was a visiting researcher at the University of the Aegean (Greece) and at the University of Southampton (UK).

Nassos has participated in a number of collaborative research projects and has co-authored more than 100 peer-reviewed articles and book chapters. He was a lead author of the First Mediterranean Assessment Report (MAR1), which was awarded the North-South prize of the Council of Europe; and has contributed to the Stern Review and to the IPCC Fifth Assessment Report.

He teaches modules on Climate Change and Coastal Systems.