It was based on seeing him in that video
Ah, OK! Thanks!
I was wondering, cuz I went back and looked at it a couple of times to see if perhaps you knew something we didn't (and were trying to lead us there) but after looking, I don't think he is based on what he is wearing (his own clothes) and the truck he is next to (which I assume is his.)
If he were either a city employee or water district employee I believe he would have on a uniform style shirt. And he'd definitely be driving a water district vehicle or city vehicle. That truck just looked like a personal vehicle. Unless he's a contractor for them? Not sure if they have contractors?