Sergiu Vatavu is a physicist who has held various positions at different institutions such as Moldova State University, Helmholtz-Zentrum Berlin für Materialien und Energie, and the University of South Florida. He has worked as a Head of Department of Applied Physics and Computer Science at Moldova State University and as a Senior Researcher at the same institution. He has also worked as a Scientist and Guest Scientist at Helmholtz-Zentrum Berlin für Materialien und Energie. Additionally, he has worked as a Researcher and Fulbright Scholar at the University of South Florida.