Willem Boei serves as a part-time lecturer at the Erasmus School of Law, Erasmus University Rotterdam. He specializes in corporate income tax, teaching in both the bachelor’s and master’s tax law programs. Additionally, he coordinates the esteemed post-master’s program in 'International and European Tax Law' offered by EFS, Erasmus University Rotterdam, and oversees the part-time bachelor’s program in tax law.

Willem’s expertise encompasses both national and international corporate income tax matters, with a particular emphasis on the international exchange of information. His scholarly contributions are regularly featured in leading Dutch tax journals.

In parallel to his academic role, Willem is a tax advisor at Deloitte’s Rotterdam office, where he leverages his extensive knowledge and experience to provide strategic tax advisory services.