- lead author for Sixth Assessment Report of the UN Intergovernmental Panel on Climate Change (IPCC) (Working Group II, chapter Europe and crosschapter cities and settlements by the sea).
- member of the Signal Group of the Dutch Delta Program
- member and one of the founders of the Society for Decision Making under Deep Uncertainty
- editorial board of the scientific journal Socio-Environmental Systems Modeling (SESMO)
- member of the Netherlands Journal of Geosciences Advisory Board