 During his career which lasted from 1970 until 2001, he served several head positions of the Serbian Police during the 1990s and as the assistant Minister of Internal Affairs (August 1993–1994).Marković was born to a Bosnian Serb family in Lukavac, Yugoslavia, in present-day Bosnia and Herzegovina.Under Yugoslav president Slobodan Milošević, Marković was appointed to succeed Jovica Stanišić as the head of the SDB on 27 October 1998.