Joost Visser is the CTO of the Software Improvement Group. In this role, he is responsible for the science behind the methods and tools that SIG offers to measure and master software. Joost also holds a position as professor of Large Scale Software Systems at Radboud University Nijmegen. He has obtained his PhD in Computer Science from the University of Amsterdam and has published over 100 papers on topics such as generic programming, program transformation, green computing, software quality, and software evolution. Joost considers software engineering as a sociotechnical discipline and he is convinced that software measurement is essential for development teams and product owners to thrive.