Convergint Technologies is a large national and has in-house installation / service staff. In my experience with national accounts, the integrator typically does not have offices fully aligned with the national client. They will make every attempt to self perform but often times they have to partner with local integrators / subcontractors to fulfill the agreement. Unless the national client is willing to pay for the travel expenses. I've seen both.
I have to imagine all of them use subcontractors at some point, for some jobs, in some areas. Or else how could they cover the entire nation?
Look at Convergint's office locations, there's quite a number of gaps in the west / Rocky Mountains. They either must use someone else or not be able to service there. Yes/no?
Do they use the subs because there is not enough business to sustain a full time office to geographically cover the entire country? I would think multi-location customers might prefer the consitency of in house service. There doesn't seem to be much offering there and I was curious why not?