Cathryn Costello holds the Andrew W. Mellon Associate Professorship in International Human Rights and Refugee Law, at the Refugee Studies Centre, Oxford, with a fellowship at St Antony's College. From 2003-2013, she was Francis Reynolds Fellow & Tutor in EU & Public law at Worcester College, Oxford, during which time she also completed her DPhil studies on EU asylum and immigration law. She has taught a range of public and EU law courses on the Oxford undergraduate and postgraduate curriculum. She began her academic career in 1998 as Lecturer in European Law at the Law School, Trinity College Dublin, and from 2000-2003, she also held the position of Director of the Irish Centre for European Law.
Cathryn has published widely on many aspects of EU and human rights law, including asylum and refugee law, immigration, EU Citizenship and third country national family members, family reunification, and immigration detention.