He worked in "Dům Slovenské kultury" in Prague in 1985–1993 (from 1990 as director) and then he worked in "Ústav pro soudobé dějiny AV ČR".
He spent time working at "Dům Slovenské kultury" in Prague from 1985 to 1993, and then took on a leadership position there from 1990 before moving to the "Ústav pro soudobé dějiny AV ČR".