Member of the board of the WEAR legal body (2003-2013)
President of the Legal Body for the International Ergonomics Association (IEA) 2006 conference in Maastricht
Member of the ISO group on (3D) anthropometry
Member of the International Scientific Advisory Board for the International Ergonomics Association 2003 conference in Seoul and (IEA) 2006 conference in Maastricht
Member of Cluster 4 work group on Physical Protection of NATO Long Term Scientific Study on Chemical and Biological Defence
President of the Dutch Ergonomics Association (1999 - 2002)
Member of the scientific steering committee for the conference Drowning 2002
Member of Work Group 20 of AGARD AMP on 3D anthropometry (1995-1998)
Co-founder and Member of the Dutch Association of Exercise Physiology (now: Dutch Association of Human Movement Science)
Achievements
Scientific leader of EU project "Prospie", about intelligent clothing for working in the heat.
Project manager of anthropometric surveys for the Royal Netherlands Air force and Navy, and how to use these data for cockpit design and evaluation
Author of a biomechanical computer model to calculate the load on human joints
Author of European patent 08154613.7 ''Method and system for alerting the occurrence of wetness''
Project manager of NedScan, a Dutch anthropometric survey, part of the CAESAR project
Author of a book on hypnosis and editor in chief of a book on working conditions