I am committed to improving the quality of movement and sleep research.I have been active in developing generic solutions for monitoring and evaluating sleep and movement since 2005. Initially via research around the reliability of modern accelerometers and how to estimate human energy expenditure from their output. Later, as creator and developer of GGIR, a widely used open source software for analysing accelerometer data. Together with fellow researchers all over the world I work on efficient, versatile, and reusable solutions.Accelting contributes to improved insights into sleep and movement. In close collaboration with many researchers, I participate in numerous projects by providing training and advice or helping with the development of algorithms and software.