Take a look at the Association Of Pet Dog Trainers website (www.apdt.com). They explain the certification process, the hours required, test requirements, etc.
At the moment, you can legally hang out a sign and tell everyone you're a Master Trainer or a Certified Dog Trainer whether you have the qualifications or not. That may change as states start to require licenses.
I'm not familar with the training being done there. I got my certification through APDT by volunteering with a local dog club......apprenticing, then teaching classes for 5 years and took the test.....lots of study, seminars in-between and picking the brains of seasoned trainers. Alot of professional trainers get their start that way....build up the knowledge, skills and then go out on their own or open a training school. Friends of mine opened an Agility Training Center several years ago and now they have a waiting list to get in.
In the mid 80s Tom Rose himself was handler and taught K9 police programs etc and even though memory is dim he had a decent reputation. It was not a Leerburg program as Frawley was not the handler Rose was. My opinion only the way I remember it. At that time the school opened it was not a Pet-oriented program at all it was Schutzhund/Police etc school.