Q: We saw that Touko is a certified speech therapist, but does she have any other certifications in addition to that?

Nasu: Ah, certifications… certifications… haha… (He has a faraway look in his eyes.) Well, it’s like this. Touko said it, too, that a certification isn’t really proof of anything, it’s just a scrap of paper. Likewise, as long as you’ve actually got the skills to back it up, things like licenses or certifications are completely unnecessary…
Takeuchi: In short, all of her certifications are forgeries.
Nasu: Right. Though, to answer seriously… if we go by categories, she’s qualified in Medical Treatment, Construction, Business, and Information Gathering.

Kara no Kyoukai - Chapter 4: “The Hollow Shrine” Movies Q & A Pamphlets