Babel

From my own experience, you need to be recruited into the business. I haven't particularly paid attention to how my employers specifically pick people, though we do have a recruiter -- not that that stops the rest of us when we feel the need. I merely happened to fall out of a Rift into their hands. Of the two I've picked up, one was a similar situation.

Though I will admit that those talents, if you're good enough, are desirable.