Dennis Gratz was born in 1978 in Sarajevo, Bosnia and Herzegovina. He graduated from the Law School of the University of Sarajevo in 2001 and received his MA degree in Democracy and Human Rights at the University of Bologna in 2002. In 2003 he passed the bar examination and started to work as an attorney at law in Sarajevo. In 2007 he was awarded a PhD degree from the University of Hamburg, Faculty of Social Sciences. His thesis dealt with systematic war crimes committed during the war in Bosnia 1992-1995, with a specific focus on elimination of local elites (Elitocide).
Among many other professional and extracurricular activities, Dennis has been working as a lecturer on Genocide and Genocidal Atrocities in Theory and International Law at the Center for Interdisciplinary Postgraduate Studies of the University of Sarajevo. He is also co-founder and member of the Executive Board of Naša stranka, a young progressive socio-liberal political party. He has written two novels and has directed three short feature films.