Willem joined the Law School in 2010. From 2007-2010 he was Head, Sociology, Anthropology, and Criminology at the University of Windsor, Canada. Previously, he also worked as lecturer at the Institute of Criminology, Victoria University of Wellington, New Zealand. His areas of interest include security and policing, particularly public order policing, security intelligence, and how governance of public safety and security is accomplished by a variety of service providers, actors, or agencies. Willem serves or has served on the editorial boards of the Australian and New Zealand Journal of Criminology, Canadian Journal of Criminology and Criminal Justice, Policing and Society, and The Open Law Journal.
Current research is on policing public order, counter-terrorism prosecutions, blended ordering or multi-agency approaches to crime prevention, and victim self-medication.