I was the student tech at my High School, Running the Windows Server 2003 Domain and File Servers. On my own time, I played with Fedora Core for a bit. Then, coming to College, I became the administrator of the Computer Science department, and became familiar with Windows Server 2008 Active Directory, File Services, etc.
This is where I gained my experience with Debian Linux (my preferred distro), and with routing and web technologies under Linux (dns, apache, dhcp, iptables). I use Cisco routers, but much prefer the procurve hardware from HP.
Now I work at Pacific Union College as the Network Security Specialist, dealing with various Windows Server technologies and Networking Infrastructure.