Yeah, I just started a couple years ago and finding the same corporate greed at a medical "non-profit" that I thought I'd left behind in the manufacturing sector was a pretty big disappointment.
Still beats helping assholes make war materials though.
A lot of factories I've been to use small calibration businesses or even just a guy who calibrates stuff as a side hustle. If there is any manufacturing in your area it might be worth asking folks who work there if they know of someone who does that kind of work but doesn't really advertise.