Maria-Kleopatra Tassi graduated from Physics Department of National and Kapodistrian University of Athens (NKUA) in 2007. She received her M.Sc diploma in Microsystem and Nanostructures of National Technical University of Athens (NTUA) in 2009 with master thesis “Composition and Characterization of spherical and linear Fe3O4 nanoparticles for application in Magnetic Resonance Imaging: In vivo experiments”. In 2014 received her Ph.D in Physics from NKUA in collaboration with N.C.S.R “Demokritos” with title “Calculation of excited state of multielectron systems via extended Hartree-Fock method and comparison with other methods”. During her Ph.D studies participated in the research program “ARISTON, Development of nanofunctional surfaces for a cleaner and safer environment” in which she contributed in the characterization of modified titanium dioxide. After her Ph.D studies, she worked from 2014 to 2018 in Physics Department (NKUA), where she studied the properties of different sequences of DNA molecule. In addition, from 2016 to 2018, she was teaching assistant in Technological Education Institute of Piraeus. From 2018-2019 she worked in National Centre for Scientific Research “Demokritos”, participating in the program “Material development with applications in Industry, Health, Environment and Civilization”. From 2019 till today she works in Stable Isotope Unit, N.C.S.R. “Demokritos” where she performs isotopic and chemical characterization of organic materials and natural products. and she is involved in all the programs of the laboratory. Her main research interests lie on the field of material and environmental characterization with analytical technics such as isotope analysis. Specifically, she performs analyses in bones, teeth for palaecological and palaeodiet reconstruction, in food industry products (e.g. wine, milk, honey) for identification of authenticity, in ancient materials (glass, mortar) for investigating their origin and in waters for examining the hydrogeological processes and for palaeoclimate reconstruction. She is, also, involved in the construction of iso-databases and the statistical analysis of them. She has 12 publications in peer-reviewed International journals and she has participated in 20 International conferences.