Neil Walker holds the Regius Chair of Public Law and the Law of Nature and Nations at the University of Edinburgh.

His main area of expertise is constitutional theory. He has published extensively on the constitutional dimension of legal order at sub-state, state, supranational and international levels. He has also published at length on the relationship between security, legal order and political community. He maintains a more general interest in broader questions of legal theory as well as in various substantive dimensions of UK and EU public law.

Previously he taught public law at Edinburgh for ten years (1986-96), was Professor of Legal and Constitutional Theory at the University of Aberdeen (1996-2000), and, most recently, was Professor of European Law at the European University Institute in Florence (2000-8), where he was also the first Dean of Studies (2002-5).

He has also held various visiting appointments - including Visiting Professor, Department of Philosophy, University of Tilburg, Netherlands (2000); Visiting Professor of Law, University of Columbia, NY(2005); Eugene Einaudi Chair of European Studies, University of Cornell (2007); and Distinguished Visiting Professor of Law, University of Toronto (2007).