- CEEES Confederation of European Environmental Engineering Societies
- ASTE Association pour le développement des Sciences et Techniques de l’Environnement
- BSMEE Belgian Society of Mechanical and Environmental Engineering
- GUS Gesellschaft für Umweltsimulation e.V.
- KOTEL Association for Cooperation for Research and Development of Electronics
- NACEI National Association of Czech Environmental Engineers
- ÖGUS Österreichische Gesellschaft für Umweltsimulation
- PLOT Platform Omgevingstechnologie
- SEE The Society of Environmental Engineers
- SEES Swedish Environmental Engineering Society