Šibul graduated from the University of Novi Sad Faculty of Agriculture, specializing in phytomedicine, and worked for the private company Poljopromet as an expert advisor in the use of pesticides.
[1] Šibul joined the LSV in 1995 and was the leader of its Kikinda municipal committee for several years.
The LSV took part in Vojvodina's coalition government after the election, and Šibul served as a supporter of the administration.
Vojvodina subsequently abolished its constituency seats and adopted a system of full proportional representation for the 2016 provincial election.
[5] He also criticized Serbia's government for confiscating land from indebted farmers unable to pay compulsory fees and taxes.