Derecho tributario
Vermeend retired from national politics and became active in the private sector and public sector and occupied numerous seats as a corporate director and nonprofit director on several boards of directors and supervisory boards (Mitsubishi Motors Europe, Randstad Holding, AFAB Company, Royal Imtech N.V., Rotra Company, Free Record Shop, DSM Company, Maison van den Boer, Meeùs Group, Society for Statistics and Operations Research, SEO Economic Research and the Energy Research Centre) and served on several state commissions and councils on behalf of the government (Bureau for Economic Policy Analysis and the Social and Economic Council). Vermeend also worked as a trade association executive for the Industry and Employers confederation serving as Vice Chairman of the Executive Board from January 2004 until September 2010. Vermeend also served as a distinguished professor of Tax law at the Leiden University from 1 August 2002 until 1 May 2004 and a distinguished professor of European law at the Maastricht University from 1 May 2004 until 1 September 2010 and a distinguished professor of Tax law at the Maastricht University from 1 January 2006 until 1 September 2010 and Vermeend has been a distinguished professor of Digital economy at the Open University in Heerlen since 1 January 2014. Vermeend is also a prolific author, having written more than a dozen books since 2002 about Business, Economics, Finances, Politics, Tax law and Computer security.