Sjoerd Douma has been professor of International & EU Formal Tax Law at the University of Amsterdam since October 2017. Before his appointment in Amsterdam, Sjoerd was a professor at Leiden University. During the IFA Congress in Rio de Janeiro (2017), Sjoerd was appointed as a member of the Permanent Scientific Committee of the International Fiscal Association.

His specializations lie in the field of international aspects of income, dividend and corporate tax, tax treaties, European tax law (including fiscal state aid) and administrative tax law. Sjoerd has written various (international) reports, articles and annotations and he is co-author of the authoritative book Algemene Wet uit Rijksbelastingen. In 2012, he received the prestigious biennial dissertation prize from the Dutch Tax Science Association for his dissertation.

He is also one of the founders of Danon, Douma & Kofler. Before Sjoerd joined Lubbers, Boer & Douma in March 2017, he worked for a large international tax consultancy for 12.5 years. In this capacity he has gained extensive practical experience, both in the Netherlands and abroad. Sjoerd has represented clients at the tax authorities, the European Commission, courts, tribunals and the Supreme Court, as well as at the Court of Justice of the European Union. For many years he was a deputy judge in the Court of Haarlem and a deputy judge in the Court of Appeal of Arnhem-Leeuwarden.