- International Journal of the Commons (www.thecommonsjournal.org) - Editor in chief
- The Elinor Ostrom Award on Collective Governance of the Commons (http://elinorostromaward.org/) - Council Member
- Natuur en Milieufederatie Utrecht (NMU) (www.nmu.nl) - Advisory Board Member
- Ethics Review Board of the faculties of Science and Geosciences - member