After he had finished his degree in Electrical Engineering with specialization in radio networks in 1996, he started working on mobile workforce and remote access solutions in IBM Global Services. In 2000, he moved to the Pervasive Computing Software service group at the IBM Lab in Boeblingen. Since then he has been working with OSGi technology. Stefan has been engaged in various mobile solution customer projects using IBM WebSphere and Lotus server as well as client software technology.