• Program co-director Epidemiology at Leiden University Medical Center
• Associate editor of Pharmacoepidemiology and Drug Safety
• Member of Scientific Advisory Board of the Dutch National Trauma Registry (Landelijke Traumaregistratie, LTR)
• Founding Specialty Chief Editor, Frontiers in Epidemiology, section Research Methods and Advances in Epidemiology
• Founder and board member of the Natural Experiments Study Group (NEXT): NEXT-studygroup.org
• Chair of the Netherlands Epidemiological Society (Vereniging voor Epidemiologie)
• Member Dutch Health Council (Gezondheidsraad), advising national government and parliament in the broad field of public health and healthcare
• Member of STRengthening Analytical Thinking for Observational Studies: the STRATOS initiative
• Panel member on various scientific evaluation committees of the Dutch Research Council (NWO / ZonMw)
• Member of the Medical Ethical Review Board, LUMC
• Member (and chair) of several Data and Safety Monitoring Boards
• Associate editor (sectieredacteur) Nederlands Tijdschrift voor Geneeskunde
• Statistical reviewer JAMA Network Open and ad hoc reviewer for, i.a., BMJ, Ann Intern Med, Am J Epidemiol, Epidemiology, Stat Med, the American Statistician