Dr. Marina Kostić joined the Institute of International Politics and Economics in April 2018. The areas of her academic interest are world order in the 21st century, defence and security policy. From 2018 to 2021, Marina served as the Secretary of the Editorial Board of the IIPE′s journal International Problems. She obtained her PhD in International and European Studies at the Faculty of Political Science, University of Belgrade, by defending a dissertation titled “The conceptions of world order in the security policies of the United States of America, the Russian Federation, and the European Union at the beginning of the 21st century.” She completed a two-year specialisation in International Politics at the same Faculty, where she also graduated in International Affairs. Marina worked for the Serbian Ministry of Defence (international military cooperation), the Belgrade Chamber of Commerce (international economic relations) and the National Assembly of the Republic of Serbia (Committee for Relations with Serbs outside Serbia). She has been awarded two scholarships – by the Konrad Adenauer Foundation (KAS) and the Organization for Security and Cooperation in Europe (OSCE). In 2020, Marina finished the EU Non-proliferation and Disarmament eLearning Course organised by the EU Non-Proliferation and Disarmament Consortium, and gained the Comprehensive Certificate. Marina has published a dozen research papers dealing with international institutions and world order, strategic and nuclear arms control and non-proliferation, bilateral and regional relations in the Western Balkans, security issues in Serbia and its policy of military neutrality, as well as the EU enlargement policy. She has participated in a number of national and international conferences, workshops and educational programmes.