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.