MCSA(W2k3) A+, Net+, Security+. Most of the servers at work they don't like us fiddling with, for good reason, so I run a few servers and VMs at home to play around with.
I'm actually an Electronics Technician by training in the Navy, making the little bits inside the wires go where they're supposed to, but this last command has me working IT. They paid for my certifications so I can't complain. I've got about 3 years "professional" experience working in an enterprise network, started as a sysadmin, moved on to network admin/security. It's not much but I'm always learning more.
Q&A for professional system and network administrators
Q&A for computer enthusiasts and power users
Q&A for people studying math at any level and professionals in related fields
Q&A for professional and enthusiast programmers
Q&A for professional programmers interested in conceptual questions about software development
Q&A for passionate videogamers on all platforms
Q&A for scientists, academics, teachers and students
Q&A for biology researchers, academics, and students
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Q&A for professional and amateur chefs
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for users of Mathematica
Q&A for Information security professionals
Q&A for professional and independent game developers