Arnout assists national and international clients in the field of individual and collective employment law issues and this in the broadest sense. In addition, he maintains a focus on developments with regard to the law pertaining to employment contracts and individual dismissals. In this context he has published several articles.

Arnout frequently pleads before the Belgian labour courts.

In 2004 Arnout obtained his Master’s degree in law from the University of Ghent. The same year he was admitted as a member of the Brussels Bar (Dutch Language Bar Association). Also in 2004, he joined Claeys & Engels.