He attended secondary school in the city, graduated at the University of Belgrade Faculty of Law and later received doctorate in political science and economics in Paris.

[1] He served as Minister of Foreign Affairs in the governments of Ljubomir Davidović (for a few months of 1924), Velimir Vukićević and Anton Korošec, last in the parliamentary term.

[4][1] With the proclamation of the 6 January Dictatorship in 1929, Marinković entered the cabinet chaired by the former commander of the Royal Guard, General Petar Živković.

[4] He replaced Živković as prime minister in April 1932, with the aim of changing the image of the dictatorship thanks to his experience as a veteran deputy and distinguished member of the Democratic Party.

[4] His program, which was left unimplemented by his early dismissal, included the liberalization of the electoral law passed in 1931 and the revision of the 1931 Constitution, approved during the dictatorship.