Well the List Marine in Sausalito sound good. About vocational school mechanics, my brother has a transmission shop and refuses to hire any of them. He is not against learning as he and the guys that work for him take in three transmission repair seminars a year.
The tech and vocational schools do not really teach a person how to do transmission repair, and the graduates think they know it all and many times will not listen and learn. He would rather start someone out pushing a broom and see how it goes from there.