I'm an elected moderator on Mi Yodeya, The Workplace, and Worldbuilding, and a pro-tempore mod on Writers and Beer, Wine, & Spirits. I'm active on Meta Stack Exchange (and several per-site metas) and think that's pretty important -- it's where the nuts and bolts of running a site get worked out.
Professionally, I'm a technical writer who works with (and often helps design) programming interfaces. I'd love to see more tech-writing questions on Writers.SE.
Mi Yodeya publications (compiled from our Q&A): http://s.tk/miyodeya
Worldbuilding blog: https://medium.com/universe-factory