In 2006 Geerten began his career at TNO and specialized himself in Mechatronics and motion control. Over the years, he gained experience in several projects involving Haptics, Optomechatronics, Astronomy and Industrial Automation. His main contribution in these projects was related to sensor and actuator choice, electronics selection, real-time systems, modeling and simulation. The last few years, he worked as a mechatronics specialist to create architectures for electronics and software in projects related to AFM, with a focus on real-time control using FPGAs.