Mario Mažić was born in Sisak and grew up between Petrinja and Sisak due to war events in the 1990. He finished general program high school and enrolled at Faculty of Political Science in 2006. He finished a summer academic program in International Relations and Political Science at the University of Oslo, Norway (2008) and Northwestern University’s Study Abroad program in Croatia in History and Literature (2010). In 2012 he participated in a Fellowship program in Historical Dialogue and Accountability at the Institute for the Study of Human Rights at Columbia University, New York, USA. During high school, he was hosting and editing a show on youth topics on a local radio station. Later in high school he joined the Croatian Helsinki Committee Youth Group and was later coordinating it before becoming an associate in the CHC’s Human Rights Education Program. He is a board member of the Humanitarian Law Center Kosovo and the European Grassroots Antiracist Movement, where he holds the position of Secretary General. He established YIHR in Croatia in late 2008 in coordination with the YIHR Regional Network.