Vassilios Vervatis is an Assistant Professor at the National and Kapodistrian University of Athens (NKUA), Greece, Department of Physics, Section of Environmental Physics-Meteorology. He was born in Athens, Greece. He received his BSc in Physics from NKUA (2002) and continued his studies in Environmental Physics (MSc, 2004), and Physical Oceanography (PhD, 2012). During his PhD, he participated in oceanographic cruises with the R/V AEGAEO of the Hellenic Center for Marine Research. He has received postdoctoral fellowships from the French National Centre for Scientific Research (CNRS, 2013-2015) and the State Scholarships Foundation (IKY, 2016-2018). He was adjunct faculty member at the School of Engineering, University of Western Macedonia (2018). His research focuses on the development of ocean digital twins. His scientific interests include the implementation of coastal/regional forecasting and climate variability systems, using coupled models and ensemble-based stochastic data assimilation. He has published 25 papers in international peer-reviewed journals, 3 contributions in book chapters and over 60 in conference proceedings. His published work has more than 600 citations (excluding self citations of all authors) with Scopus H-index 11. He co-supervised 6 completed MSc dissertations. He has participated in more than 20 projects, in 3 of them (Copernicus Marine Service Evolution projects) was principal investigator. He is member of the Editorial Board of Copernicus open-access journals. He contributed as referee and evaluator in over 20 scientific journals and EU proposals.