Mensur is Senior Program Manager at the Roma Initiatives Office of the Open Society Foundations, where his work focuses on Roma empowerment using the tools, methods, and approaches of civic and political leadership development, voter empowerment and protection, and youth activism and organizing. Before joining the Open Society Foundations, Mensur worked in 2005-2006 as Local Contact Point in Serbia for the Organization for Security and Cooperation in Europe on issues affecting Roma refugees from Kosovo. From 2007, he served as the executive director of the Forum of Roma IDPs, a nongovernmental organization focusing on the rights of Roma refugees from Kosovo. In 2008, he gained experience in political campaigning as a spokesperson for the Roma Party, which succeeded at winning a seat in the parliament for the first time. That year, he also worked as an adviser to the Ministry for Human and Minority Rights. In 2010, Mensur was a Roma Initiatives Fellow concentrating on activities related to grassroots organizing and advocacy in the Western Balkans. He completed a year of the Youth Leadership Program (2010) at the Belgrade Open School and has completed the “Leadership, Organizing and Action: Leading Change” program (2011) at Harvard University’s John F. Kennedy School of Government. He is especially interested in teaching, research, and writing on leadership, organization, and strategy in social movements, civic associations, and politics.