Frank Engelen (1971) is Professor of International and EU Tax Law at Leiden University and Board Member of the International Tax Center Leiden. He is also a Tax Partner at PwC (2003) and Member of PwC’s Board of Management, responsible for Clients & Markets (2013). Frank is a Deputy Judge at the Court of Appeals of The Hague.

Frank Engelen graduated from Erasmus University in Rotterdam in 1996, where he was a lecturer of International and EU Tax Law from 1998 until 2004. In 2004 he obtained his doctorate with a dissertation on “Interpretation of Tax Treaties under International Law”, which was published in the Doctoral Series (Vol. 7) of the IBFD and granted an Honorable Mention by the Jury of the 2005 Mitchell B. Carroll Prize. In 2005, Frank Engelen was appointed at Leiden University on the newly created chair of Public International Law Aspects of International Taxation (inaugural lecture: `On values and norms. The principle of good faith in the law of treaties and the law of tax treaties in particular´).

Frank has authored and co-authored several books and numerous articles on international and European taxation issues. He also lectures European tax law at the postgraduate course European Fiscal Studies at the Erasmus University of Rotterdam and is a regular speaker on issues of international and European tax law at international conferences. Frank is a member of the Netherlands Association of Tax Advisors (Nederlandse Orde van Belastingadviseurs), the Association for Tax Research (Vereniging voor Belastingwetenschap), the International Fiscal Association and the European Association of Tax Law Professors. On several occasions, Frank has served as an expert witness in international tax matters.