I guess it depends what he's looking for. If its just to pay someone to pull a wrench, then that place should be fine. Turbos/Injectors/Exhaust and all that is all kinda the same... As far as chips and such, the OP is better off to get stuff from the vendors on here.
If it's trouble shooting he's looking for, there's lots of that here as well.
So, OP, what do you need from this diesel shop you're hunting for?