Paul Adriaanse is lawyer at Justion Advocaten and parttime Associate Professor at the Department of Constitutional and Administrative Law of Leiden University. He obtained his Masters degree as well as his PhD from VU University Amsterdam. He also studied at the Université de Paris 1 (Panthéon-Sorbonne) and holds the degree of LL.M in Comparative, European and International Legal Studies from the European University Institute in Florence. Paul Adriaanse is an expert on issues of enforcement in the field of EU State aid law. He is member and coordinator of the Leiden Expert Group on State Aid (LEGSA) and he often teaches in State aid courses for legal professionals.