Marcus started working on Opensource programs during his studies of computer science at the University of Erlangen-Nuernberg in 1992. He got involved with with the free Windows Emulator Wine in 1995 just trying to fix some bugs. After finishing his studies and one year of civil service he went to work for Caldera Germany in 1999 as a Software Developer. After Caldera stopped developing Linux distributions in 2002 he moved to SUSE where he is now the engineering lead of the SUSE Security Team. He still does some Wine bugfixing in his spare time, but focuses more on enhancing libgphoto2.