- CEO of SURF, the collaborative ICT organisation for the Netherlands' higher education and research secto
- Managing Director of SURFnet, the national research network. Kees held the post for over 24 years.
- Electrical Engineering at Eindhoven University of Technology
Kees was also
- Treasure, Vice-president and President of Réseaux Associés pour la Recherche Européenne (RARE)
- Vice-president for Services and Technology at TERENA
- Chairman of the RIPE NCC Executive Board
- Board member and Executive Board member at the Internet Society (ISOC)
Nice to know
- Kees played an important part in the foundation of AMS-IX, the world's biggest internet hub, RARE/TERENA, RIPE NCC, ISOC and ISOC.nl.
- In 2012, Kees was inducted as Pioneer to the Internet Hall of Fame, the honorary list of people who were involved with the internet during its infancy.