International Institute of Welding (IIW)
- Member IIW Commission XIV: “Education and Training”
- Member IIW Commission XVIII: “Quality Management in Welding and Allied Processes”
- Member IIW WG-STAND
IIW – IAB the International Authorisation Board of the International Institute of Welding
- Member IAB Group A: “Education and Training” (Chairman 2011-2020)
- Member IAB Group B: “Authorisation and Qualification”
- IIW Assessor (2001 – 2009); IIW Lead Assessor (2009-2021)
Dutch Standards Committee (NEN)