The UG has published an overview of all outside activities of its professors. These jobs must be declared unless they are unrelated to the work professors do for the University.
Previously, outside activities could only be found on the professors’ personal pages. This has now changed due to political pressure. Transparency is an essential condition for scientific integrity,’ says the umbrella organisation Universities of the Netherlands (UNL).
The overview for the UG can be found here, and the overview for other universities can be found on the UNL website.