In the 1990s he worked as a journalist and a trainee solicitor. From November 2000 to June 2010 he served three terms as the provincial secretary for regulation, administration and national minorities of the AP Vojvodina, and from June 2010 he was the first democratically elected president of the National Council of Hungarians in Serbia. He taught at higher education institutions from 2002. From 2007, he was employed at the Faculty of Legal and Business Studies „Dr. Lazar Vrketić“ in Novi Sad (UNION University), where in the capacity of an Associate Professor he taught the subjects Constitutional Law, Administrative Law, Administrative Process Law and Judicial Organisation Law.

He is the author of more than 70 scholarly papers, including monographs in Serbian, Hungarian and English.

He is an honorary professor at Obuda University in Budapest and Széchenyi University in Győr, at the University of Science in Szeged (all in Hungary) and at Trieste University (Italy).

In addition to Hungarian and Serbian, he can speak and write in English, and can use German.

He is on the editorial board of the science journal „Létünk”, in Novi Sad.

He is married and has four children.

He was appointed Judge of the Constitutional Court in December 2016.