Markow202, CHCJ is on a backup transmitter which is even harder to receive in Etobicoke than its main transmitter which isn't easy for many of us.
"They probably have a limited number of techs that serve several sites and types of facilities. ..."
ExDilbert is exactly correct. In the old days each station had it's engineers. Then it was centralized and a lot of expertise was given their walking papers. Now there's probably less than a handful of people at Bell in the whole country who even know what ATSC is (or how to even spell it

). I'd bet that handful do it on the side (they have other "full time" of close to full time assignments).
"they could easily have one of the CFTO transmitter techs visit the site instead of having someone drive all the way from Barrie "
As far as I know, there is no one in Barrie any more other than local news people. All the engineering is done out of Scarborough (401 and McCowan) for all of Ontario (or maybe more?). Given how large companies operate, Bell like has a cost center for "Television Transmitter Maintenance" with a token small amount of money in. Somebody likely has to make a proposal to draw on it and have it approved at several layers of management, even for something as small as gas money to drive from Scarborough to Hamilton and back plus per the hourly rate, and that the time spent is time taken away from other responsibilities this person would have.