Majstorović graduated from the Department of International relations at the University of Belgrade Faculty of Political Sciences and received his MA degree at the University of Graz Karl-Franzens Faculty of Law, Department of European Integration and Regionalism.

[1][2] After graduation, he worked as the assistant teacher of European Studies and Civil Society at the Belgrade Open School from 1997 until 2001.

He then worked in the sector for European Integration in Republic of Serbia's Ministry of Foreign Economic Relations between 2003 and 2004.

He became a member and the deputy chairperson of the Commission for the Implementation of the National Judicial Reforms Strategy for the period 2002–2018.

[1][8][2] Majstorović is also one of the visiting lecturers on the staff of the University of Belgrade Faculty of Law.