 In 1956 he became an assistant at the Historical Institute of the Academy in Zagreb, where he worked since 1988 as a research associate, and since 1990 as a scientific advisor.From the 1979 he served as a manager, and in the period 1995-2002 as the Head of the Department of Historical Sciences at the Croatian Academy of Sciences and Arts.In 1994 he was elected as an associate member of the Academy.