I'd have to check to see what my company calls me. Here, at the job site, the hired a "Data Engineer"; I'm in the "Data Engineering" group. I do database stuff, primarily, but I get to apply my Solaris system admin skills as needed (with the option of deferring to the System Administration folks when I get stumped or don't want to deal). I get to be a guru in certain areas.

When people ask me, I either say "Data Engineer" or "Computer Geek", with amplification as necessary.