* RedHat / FedoraLinux OS developer (2007 to present)
* Xorg (X Wingow System) developer (2007 to present)
* GCC compiler maintainer (2003 to present)
* Linux kernel hacker (2002 to present)
* NetBSD developer (2000-2001)
* Co-maintainer of Motorola Background Debug Module driver (2003-2005)
* RedHat / FedoraLinux OS developer (2007 to present)
* Xorg (X Wingow System) developer (2007 to present)
* GCC compiler maintainer (2003 to present)
* Linux kernel hacker (2002 to present)
* NetBSD developer (2000-2001)
* Co-maintainer of Motorola Background Debug Module driver (2003-2005)