Around me, auto sups are in charge of 5 different centers. You could have mechs with 1 year to 20+ years. I see my supervisor every couple of months, most communication is done through emails or phone calls. I prefer it this way. Sups rotate centers every couple of years. Seems like most like the job, alot of dumb paperwork. UPS doesnt run their "shops" like a normal repair center. We dont stock alot of parts. Some centers carry this, some that, we waste alot of time calling other centers to have parts shipped from A to B. Most of our training is, belt safety, lifting techniques and how many times you beep the horn while backing a truck up. There is no mechanical training, just how many times to beep the friend$$cking horn. The vehicles range from the early 90s to today, diesel, gas, CNG/LNG, who knows what else. I wouldnt be surprised if we are still running horse drawn carriages somewhere.