Dr. Vincent T van Hees is a developer of widely used algorithms and software (e.g. R package GGIR) for processing and analysing wearable accelerometer data. He is committed to improving the quality of research into human movement and sleep. In collaboration with fellow researchers and developers across the world he aims for solutions that are efficient and reusable. Do you run into issues with Open Source software, or simply do not know where to start? Dr. van Hees may be able to help you.