Hannes is a DPhil candidate in the field of public international law, supervised by Professor Dapo Akande. His research focuses on the administration of justice by non-state armed groups and is supported by the Arts and Humanities Research Council (AHRC). Hannes holds law degrees from the University of Graz and University College London (UCL) where he was awarded the Georg Schwarzenberger Prize in International Law by the Institute of Advanced Legal Studies (University of London). In 2020-21 he was the Judicial Fellow to Judges Gaja and Nolte at the International Court of Justice (ICJ) in The Hague. During his doctoral studies, he also provided reserach assistance to the International Peace and Security Programme at the Oxford Institute for Ethics, Law and Armed Conflict (ELAC).
Before coming to Oxford, Hannes worked as a legal advisor on human rights, constitutional law and judicial affairs in the Austrian Parliament. He has also clerked at the Israeli Supreme Court in Jerusalem and was an intern at the United Nations Offices in Vienna and Geneva.