Yeah, Google and a couple other companies often hire "Analytical Linguists" as their labelers, or to help write their guidelines and manage labeling projects.

Although -- and I say this having done a lot of my graduate coursework in linguistics -- I don't think having a linguistics background is particularly needed (unless you're doing specialized annotation, like creating syntax trees or tagging phonemes in Praat), outside of you being more likely to enjoy thinking about the nuances of language.