Nils Joachim Melzer (born 1970) is a Swiss academic, author, and practitioner in the field of international law. From 2016 until 2022,[1] Melzer was the United Nations Special Rapporteur on Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment. He is a professor of international law at the University of Glasgow. From 2011-2013, he was Swiss Chair of International Humanitarian Law at the Geneva Academy of International Humanitarian Law and Human Rights. Melzer has criticised the governments of the U.S., the U.K., Ecuador and Sweden over their treatment of Julian Assange.