Professor of Szczecin University, Faculty of Law and Administration, director for Poland of the European Master “Law and Policies of European Integration: European Constitutional Law and Multilevel Constitutionalism”. In the years 2003-2007 professor at the Catholic University of Lublin and chair of the department of European Union Law. At the same university: 2002-2003 (associate professor), 1991-2001 (assistant professor).