He has been an MP in the State and Federal legislatures for more than 10 years. At the first multi-party elections in Serbia in 1990, he was elected a Member of Parliament of Serbia on behalf of the Democratic Party. As a Member of Parliament on the state level, he was elected a delegate to the Chamber of the Republics (upper chamber) of the Federal Parliament of Yugoslavia in the period 1991-1992. At the Federal elections in 1992, Mićunović was elected a Member of the Federal Parliament as a representative of the Democratic Party. As a member of the opposition coalition “Zajedno”, he was re-elected a Member of Federal Parliament in the Chamber of Citizens (lower chamber) in 1996.