Justice Catherine O'Regan served as one of the first eleven judges of South Africa's Constitutional Court, which was established shortly after the transition to democracy in 1994. Her fifteen-year term ran from 1994 – 2009. Since her term on the Court ended, she has served as an ad hoc judge of the Namibian Supreme Court (2010 – 2016), and as the Chairperson of the United Nations Internal Justice Council (2008 – 2012), as well as serving as a judge on several international tribunals. Since 2016, she has been and professor of human rights law and inaugural Director of the Bonavero Institute of Human Rights in the Faculty of Law at the University of Oxford.