He was elected member of Croatian Parliament, president of the Independent Democratic Serb Party, 2nd Chairmen of the Government of Eastern Slavonia, Baranja and Western Syrmia and minister without portfolio in the last Cabinet of Milan Babić of the Government of the RSK.

Over the years Stanimirović's political positions evolved from that of hawkish Serbian Radical supporter of unification of the Republic of Serbian Krajina and Republika Srpska before Operation Storm and prominent critic of more conciliatory and FR Yugoslavia aligned local authorities in Eastern Slavonia, to the main proponent of moderation and compromise after the initiation of the UNTAES mission in the region in which he was more willing to compromise than his former opponents.

[4] During the 1991 Battle of Vukovar, Stanimirović was a reserve officer who led the medical corps of the Yugoslav People's Army.

In his 1993 article in a local newspaper "Vojska Krajine", the Vukovar Hospital was described as "the last Ustaše fort".

[8] In 1995, Stanimirović was decorated with Order for Special Merits in Podunavlje by the former president of Republika Srpska, Radovan Karadžić in Banja Luka.