• European Food Safety Authority (EFSA)
• Member NDA-panel (Nutrition, dietetic products and allergies) (2006 - present)
• Working group Novel Foods (Chair as of 2012)
• Working group Health Claims
• Working group Dietary Reference Values for Minerals
• Working group Guidance Review
• Working group Caffeine
• University of Ulster, Northern-Ireland Centre for Food and Health, Coleraine, Northern Ireland
• Visiting Professor Nutrition and Food Safety
• Food Valley Award committee
• Graduate School VLAG, board member, representing RIVM
• Ik Kies Bewust/het vinkje, Scientific Commission, agenda member

Editorial boards

• European Journal of Food Research & Review (Chief Editor)
• Food and Chemical Toxicology
• Voeding Nu
• European Food Research and Technology
• Current Topics in Neutraceutical Research
• African Journal of Biochemistry Research
• PharmaNutrition

Memberships

• Nederlandse Vereniging voor Toxicologie
• European Environmental Mutagen Society
• Nederlandse Academie van Voedingswetenschappen)(2003-2009)