Training focuses on the human resource of service contracting.
Management just happens. You take your best tradesman and put him in charge of everyone else. Or, maybe it's the guy with the most seniority who gets the nod. Who better to teach your people the way things have always been done at your shop?
Management training? Get real. That may be OK for Fortune 500 companies, but who in this industry has time for it? All anyone needs to know is it's the boss's job to tell the workers what to do, and their job to do what he says, or hit the road.