Maciej Jaroszewski was born in Wroclaw, Poland, in 1966. He received M.S and Ph.D. in high voltage engineering from Wroclaw University of Technology, Wroclaw, Poland, in 1993 and 1999 respectively. He was contractor/ prime contractor of 3 Grants and a head of Grant 4T10B03722 \'Degradation processes and diagnosis methods for high voltage ZnO arresters for distribution systems\'. He is conctractor of the key project POIG no. 01.03.01-00-006/08 cofinanced from the founds of European Regional Development Found within the framework of the Operational programme Innovative Economy He is with Institute of Electrical Engineering Fundamentals of Wroclaw University of Technology, Poland, as a assistant professor and head of High Voltage Laboratory. His current research interests include high voltage technique, HV equipment diagnostics, HV test techiques, degradation of ZnO varistors, dielectric spectroscopy.