Jan was the head of the Czech Centre for Human Rights and Democracy in 2018-2023. He has a PhD in international law, and an E.MA degree in human rights from Venice and Graz. He worked in a law firm, as well as in the Legal Affairs Division of the European External Action Service in Brussels. He later worked as a Visiting Professional in Chambers of the International Criminal Court in The Hague, and subsequently as a lawyer at the European Court of Human Rights in Strasbourg. In the Czech Republic, he worked at the Office of the Public Defender of Rights and at the Institute of International Relations in Prague. He currently teaches at Masaryk University and works in research. He specializes mainly in international law and human rights.