Thomas Unger is an independent expert on transitional justice (TJ). At Impunity Watch he provides strategic advice on issues of international policy and TJ. He is also advising various other international organisations on TJ matters, including the UN, EU and the Swiss Foreign Ministry. He has been the Co-Director of the Master of Advanced Studies in Transitional Justice, Human Rights and the Rule of Law. He is the former Senior Adviser to the UN Special Rapporteur on the promotion of truth, justice, reparation and guarantees of non-recurrence. He worked for many years as a human rights officer within the Austrian Foreign Ministry, as well as a legal system monitor with the OSCE Mission in Kosovo, and as a legal clerk with the Office of the Prosecutor of the International Criminal Tribunal for the former Yugoslavia (ICTY). Since 2022 he is an associated expert to the Dealing with the Past Program at swisspeace. Thomas is a regular expert lecturer on TJ at the Austrian Centre for Peace.