| >2020 | Co-chair preclinical working group Ensuring Value in Research Funder Forum. |
| >2018 | Representing the UNL (Organisation of universities in the Netherlands) in the transition team towards animal-free innovations in the Netherlands |
| >2016 | Board member Evidence Synthesis International |
| >2016 | Member “Medische Adviesraad” Reumazorg Nederland |
| >2006 | Member TRAIN (Three R’s Alternatives Initiating Network) |
| >2004 | Member of the grants board of the ESLAV-ECLAM foundation |
| >1998 | Member of the Council of Management, Laboratory Animals Ltd. |
| 2020 – 2022 | Member “Stuurgroep streefbeeld transitie proefdiervrije innovaties in het onderwijs – VSNU en NFU” |
| 2019 | President elect ECLAM |
| 2018 – 2022 | Member of Radboud Platform voor Geluk |
| 2018 – 2020 | Member Scientific Advisory Board, 3R Competency Center, Switzerland |
| 2017 – 2021 | Member of Executive Committee of ‘Healthy Society’, a multidisciplinary research Consortium at the Radboud University |
| 2016 – 2018 | Secretary ECLAM |
| 2015 | Secretary elect ECLAM |
| 2009 – 2014 | Chair of the Executive Committee of Laboratory Animals Ltd. www.lal.org.uk |
| 2008 – 2012 | Member of the “Centrale Commissie Dierproeven (CCD)”, central advisory committee on animal experimentation for the ministry |
| 2007 – 2007 | Member of the FELASA accreditation board for teaching and training, www.felasa.eu |
| 2007 | Member Editorial Council “Grenzen aan de zorg”, NFU (Nederlandse Federatie van Universitair Medische Centra) |
| 2006 – 2011 | Member of the ZonMW committee on 3R Alternatives, The Netherlands |
| 2006 – 2010 | Member Raad van Toezicht, Stichting Informatie Dierproeven (SID) |
| 2006 | Chair of the scientific quality committee of the ZonMW fund for alternatives, The Netherlands (wetenschappelijke kwaliteitscommissie) |
| 2006 – 2007 | Member of the national Committee on Biotechnology (CBD), The Netherlands |
| 2005 – 2006 | President of the FELASA board (www.felasa.eu) |
| 2004 – 2009 | Chair of the COST working group on Refinement of procedures, COST action B24: Laboratory Animal Science and Welfare |
| 2004 – 2009 | Member of the Management committee of COST action B24 |
| 2003 – 2009 | Member of the Executive Committee, Laboratory Animals Ltd. (www.lal.org.uk). Since 2008 Vice-chair |
| 2000 – 2004 | Vice-president for the working groups in the FELASA Board |
| 2001 – 2004 | Chairperson Ethical Review Committee H. Lundbeck A/S, Denmark |
| 2001 – 2003 | Study leader in the research group of the Center for Bioethics (leader Prof. Dr. Phil. Peter Sandoe) focussing on the ethics and welfare of genetically modified mice |
| 2000 | Member of the central Danish Ethical Review Committee, representing the Danish Agricultural and Veterinary Research Council |
| 2000 – 2002 | Member of the “programmacommissie Zorgonderzoek Nederland”, providing funding to Dutch projects on alternatives |
| 1999 – 2000 | Member of the FELASA board, representing ScandLAS |
| 1997 – 2005 | Danish representative in ICLAS for the Danish Agricultural and Veterinary Research Council |
| 1993 – 1996 | Member of the FELASA Board, representing the NVP |
| 1991 – 1996 | Secretary and President of the NVP Board |