• Member of the Health Council of the Netherlands (Gezondheidsraad) (2010-2018)
  • Member of the Gezondheidsraad Standing Committee on Infection and Immunity (2007-2018)
  • Chair of the scientific advisory committee of patient support group Stichting Afweerstoornissen (SAS) (2005-2014)
  • Chair of World Health Organization (WHO) meeting on pneumococcal vaccination and carrier status (2012) 
  • Member of various national Health Council advisory committees, including committees on pneumococcal and meningococcal C vaccinations in the NIP (2002), pandemic influenza (2009), HPV (cervical cancer vaccine, 2007-2008) and cervical cancer screening (2009)
  • Member of the national ‘Medical Framework Plan’ for medical student education (2008)
  • Chair of the Ter Meulen Fund of the Royal Netherlands Academy of Arts and Sciences (Koninklijke Nederlandse Akademie van Wetenschappen, KNAW) (2007-2012)
  • Board member of the Immunology and Infectiology Section of the Dutch Paediatric Society (Nederlandse Vereniging voor Kindergeneeskunde) (1997-2009)
  • Member of the KNAW Scientific Council (2007-2011)
  • Member of various NWO committees on AGIKO and Clinical Fellowship stipends (2005-2012)
  • Board member of the Dutch Society for Immunology (Nederlandse Vereniging voor Immunologie, NVVI) (2004-2008)
  • Board member of the Interfaculty Working Group for the Study of Immune Deficiencies (2001-2013).