Martijn studied Cognitive Psychology and Ergonomics at the Free University of Amsterdam. After graduating he started working in the usability lab of Exact Software in Delft testing software applications. He then decided to orient on more internet related products and joined Razorfish Amsterdam. In 2001 a large number of internet bubbles burst and at the end of 2001 Razorfish Amsterdam was no more.
At Razorfish, Martijn started at the same time as Tjeerd de Boer. When Tjeerd founded User Intelligence after the Razorfish adventure, he asked Martijn to help him on a project. This cooperation continued and Martijn became the first employee of User Intelligence in 2005. As a User Experience Consultant Martijn is responsible for a broad range of activities. Besides designing and improving interfaces, he is primarily involved in the evaluation of websites and applications (e.g. User testing and Expert reviews).
Martijn has been active in the Chi Nederland (former SIGCHI.nl) web commission since 2001. On Saturdays you can find him in a dojo in Amersfoort where he practices iaido and kendo. Once in a while he writes something in his blog.