Working as a Configuration Management, Build, Release Engineer since 2002; tester for several years before that on the Windows OS storage driver stack and several other shops since then. Cut my teeth on open source, but have been working pretty solidly with Microsquish since 2006. I'm mostly self-taught and have had some great mentors, now and along the way.
While I currently tilt toward MS-based solutions, I'm in the process of exploring the non-MS space and I'm happy to utilize whatever will get the job done. Further, when I grok a solution, I love sharing the knowledge.