Demeter Tzeli is an Associate Professor of Chemistry, Department of Chemistry, Laboratory of Physical Chemistry, National and Kapodistrian University of Athens, Athens, Greece and a Collaborating Researcher at the Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, Athens.  She holds a PhD (11/2000) in Physical Chemistry from the Dept of Chemistry, NKUA. She worked at the PNNL/USA (7-9/1998); NKUA/Greece (2001-8/2006); University of Groningen/Netherlands (10-11/2004); INN/Demokritos/ Greece (3/2013 -7/2014); TPCI/NHRF/Greece (9/2006-12/2012; 8/2014-); NKUA/Greece (9/2019- ). She has been the recipient the Greek Award 2009 L'ORÉAL-UNESCO for the Women in Science.  She is the author of 68 research articles in international scientific journals (887 citations, h-index=17). She is an active reviewer for more than 30 international journals, and for 5 European and national organizations. She is a member of the Editorial Boards of six scientific journals. She has expertise in Computational Chemistry and Physics and in Theoretical Chemistry. Her research includes theoretical studies of molecules and systems which have applications in astrophysics, catalysis, microelectronics, nanomaterials, magnetic materials, chemical sensors, optics, molecular logic gates, biological systems and medicinal chemistry. She is married with five children.