Themistoklis D. Kefalas received the diploma in electrical and computer engineering and the Ph.D. degree from the National Technical University of Athens (NTUA), Greece in 2005 and 2009 respectively.
Since 2010 he is Adjunct Assistant Professor at the School of Pedagogical and Technological Education, Greece. He has worked for the Greek public sector (OTE SA, PPC SA, Ministry of Environment Energy and Climate Change) and private sector (ISD SA).
He has participated in European and Greek-National research programs concerning electrical machines applications in the renewable energy market, electricity grids, aerospace industry, and electric car. He is the author of 22 journal papers and 30 conference papers. He is a member of the IEEE and the Technical Chamber of Greece.