- Student of Computer Science in Lübeck, Germany until autumn 2011.
Involvement in Open Source Projects
- Core developer of the Xfce desktop environment and current president of the Xfce Foundation.
- Developer of the graph drawing subsystem of the PGF/TikZ graphics package.
- Guitarist in a German stoner rock outfit (previously active as a drummer and bassist for other bands).
- Occasionally active in sports like running, snowboarding and surfing.