In Europe Arnold had guest professorships at the Städelschule in Frankfurt (1999), the FAMU in Prague (2009/10) and the University of Art and Design in Linz (1998).
In Europe Arnold held visiting positions at the Städelschule in Frankfurt (1999), the FAMU in Prague (2009/10) and the University of Art and Design in Linz (1998), which were academic engagements.