Historian at the Faculty of Political Science and International Relations, Matej Bel University in Banská Bystrica (Slovakia).
In his research he focuses on historical and contemporary varieties of fascism, political radicalism, nationalism and war studies with special focus on Slovakia, Czechoslovakia, and Central Europe.
An author of 13 books, more than 80 journal articles and conference proceedings (published in Slovakia, Czech Republic, Poland, Netherlands, Romania, Serbia, and Belarus).
A former visiting postdoc & research fellow at the Institute of Czech History, Faculty of Arts/Charles University in Prague (CZ), Zentrum für Holocaust-Studien/Institut für Zeitgeschichte in Munich, Collegium Carolinum - Forschungsinstitut für die Geschichte Tschechiens und der Slowakei (DE), Institut für Osteuropäische Geschichte/Universität Wien (AT), and Mémorial de la Shoah Paris (FR).