I am the Director of Enterprise-Architecture for major european ISP. I hold a MSc equivalent (Diplom-Informatiker) degree in Computer Science from the Karlsruhe Institute of Technology, using computers since 1987, Linux since 1998 (S.u.S.E. Linux 5.3 with Kernel 2.0.35) and Solaris from Version 8 to 10, had a active CCNA/CCNP certification once and did a lot of embedded development on a bunch of microcontrollers and a lot of operating system development back at the university. Nowadays I'm busy working on one of the biggest commercial eMail systems in the world with over 100 million active users.