Prof. Dr. Helen Keller, LL.M., was born in 1964 and studied law at the University of Zurich. She worked as a research associate at the Institute of Law of the University of Zurich from 1989 to 1993, and obtained her doctorate in 1993. This was followed by an LL.M. at the Collège d’Europe in Bruges, Belgium, a 1995 research fellowship at the European Law Research Center at Harvard Law School, Cambridge, Massachusetts, and a further research fellowship at the European University Institute in Florence in 1996. Prof. Keller then held a position as an Oberassistentin at the University of Zurich, in the course of which she led the project to produce a commentary of the Swiss Federal Act on the Protection of the Environment (Umweltschutzgesetz). In 2001, she was a visiting fellow at the Max Planck Institute for Comparative Public Law and International Law in Heidelberg.
In 2002, Prof. Keller completed her habilitation at the Faculty of Law of the University of Zurich. From 2002 to 2004, she held the position of professor (ordinaria) for constitutional law at the University of Lucerne, Switzerland. She then accepted a position at the University of Zurich, where she taught constitutional, European and international law until 2011. From 2008 to 2011 she was a member of the United Nations Human Rights Committee.
Prof. Keller spent most of 2009 at the European Court of Human Rights in Strasbourg, where she worked on a research project concerning friendly settlements before the Court. In 2010 she completed a research fellowship at the Centre for Advanced Studies in Oslo, during which she researched the reasons why States ratify human rights treaties.
From October 2011 to December 2020, she was full-time judge at the European Court of Human Rights in Strasbourg. She has been awarded an honorary doctorate by the University of Fribourg in 2018 for her contribution to cross-fertilisation of doctrine and practice. Finally, in 2020 she was awarded the Recognition Prize of the Foundation for Western Ethics and Culture. Since December 2020, she has served as a judge at the Constitutional Court of Bosnia-Herzegovina.