according to that link above, this lens was added to LR version 6.0, which is the same as CC. So the question is, why don't I see it in the lens profiles available? The only Tamron lens that comes up for me is the 28-75mm, f2.8
Are you opening JPEGs? If so then I think there's only the one profile. The Tamron 15-30mm f2.8 profiles are for the raw format.
Turns out the image was a tiff that I was reimporting from HDR processing in Photomatix Pro. Guess I should have performed the lens correction before exporting the images.
Sent from my iPad
Try with a RAW file, you may see Tamron 15-30mm profile.
With JPEG files, you cannot use it.