Zelenović graduated from The University of Belgrade, Faculty of Law.

[1] He is a co-founder of the Alliance for Serbia, which was officially founded on September 2, 2018.

[1] On February 23, 2020, Zelenović and his party, Together for Serbia, announced that they will participate in the 2020 Serbian parliamentary elections.

[3] After the local elections in Šabac and the repetition three times, he officially lost to the Serbian Progressive Party although he announced that he would not admit defeat and that the votes were invalid.

As of October 23, 2020, he is no longer officially the mayor of Šabac, after which he announced a boycott of the city assembly and the expansion of his policy to the state level.