Some studios do. Look around for the bigger outfits, and study/compare what they offer as a career path/packages very carefully. There are decent businessman and there are sharks in any business.
If you get attached to a 1-man show, make sure he is a good teacher (some photographers are excellent in business and shooting, but not so good in teaching). Sometimes, working with just one main photographer allows you to learn a lot more.
All the best.