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).
Arnold's European academic career included guest professorships at the Städelschule in Frankfurt (1999), the FAMU in Prague (2009/10) and the University of Art and Design in Linz (1998), highlighting his international teaching experience.