Milić was mentored by Yugoslav-record holder for the men's 1500 meters, Dragan Zdravković. Milić trained with AK Partizan up until he left Yugoslavia, and by the end of his spell with Partizan's track club, he had posted the club's third fastest men's 1500 meter time in history. At the 1997 Summer Universiade, he finished in seventh overall in the men's 1500 meters. He also made an appearance in the men's 1500 at the 1999 Summer Universiade, although he did not place past the qualifying rounds.