Andrej Stefanovic works as a diplomat at the Ministry of Foreign Affairs of Serbia. During 2023 and 2024, he was a desk officer at the Arms Control Department, and from 2019 to 2023 he was assigned to Serbia's Permanent Mission to the UN in Geneva, where he covered disarmament and arms control issues. In the course of this assignment, he completed many programs in arms control, including the EUNPDC Internship and the CTBTO/CENESS Research Fellowship.