Professor Snell’s main research interest is European economic integration. He was co-editor of European Law Review until 2019 and is now a member of the Editorial Board of the journal. Until 2024, Professor Snell was the Chair of the Law, Political Science and Public Administration Panel for Julkaisufoorumi, which is a project set up by the Federation of Finnish Learned Societies to evaluate research quality. He has given evidence to the Finnish Parliament on various questions relating to European integration. He is a Member of the Editorial Board of European Business Law Review. He is a frequent speaker at international conferences and has delivered papers inter alia at Universities of Amsterdam, Antwerp, Cambridge, Helsinki, Leeds, Leiden, Oslo, Oxford, and Utrecht, as well as at Copenhagen Business School, King’s College London and University College London. He has examined PhDs for example at University of Oxford and European University Institute. He is on the EU reserve list of persons who may serve as members of the UK Withdrawal Agreement arbitration panel.

Professor Snell has taught EU law at numerous institutions, including the UK Civil Service College, King’s College London, the University of Leicester, and Univ. Carlos III (Madrid). He has acted as an external examiner of LLB or LLM programmes inter alia at the University of Edinburgh, King’s College London, Queen Mary University of London, and Trinity College Dublin. At Turku, he teaches courses on the Foundations of European Law, on EU Competition Law and on Internal Market Law, and supervises dissertations both at the undergraduate and postgraduate levels.