He served as Secretary of the local county branch of the Hungarian Socialist Workers' Party (MSZMP) for a few months in 1989.
During the "regime change", he became a founding member of the Hungarian Socialist Party (MSZP) and was elected to the national board.
[2] Following the Socialists' victory at the 2002 parliamentary election, Iváncsik was appointed Secretary of State for Defence, serving under minister Ferenc Juhász.
In the same time, Iváncsik became assistant secretary of state to György Szilvásy, who served as Minister without portfolio for Civilian Intelligence Services.
[2] Iváncsik secured a parliamentary seat from his party's national list and was elected vice-chairman of the Defense and Law Enforcement Committee.