From 2006 to 2012 van Aaken was the Max Schmidheiny-Stiftung Tenure track professor of law and economics, Public law, international and European law.
Von 2006 bis 2012 war van Aaken Max Schmidheiny-Stiftung Tenure Track Professor für Law and Economics, Öffentliches Recht, Völker- und Europarecht.