I used to work at a packaging machine OEM. Lots of robotics, bespoke designs, and every day was like an episode of How It's Made. Very fun, but eventually I left to chase the SV startup circuit. All of my old co-workers still work there.
The equipment may have gotten better but in my time, entire careers went into making those labels go on straight and not jam up the machine.
Weiler Labeling Systems comes to mind.
For various reasons I outgrew the job, and work for a very big company today, but I still get into the plant on a regular basis.
One area where you can get that kind of work is a plant that actually makes the gizmos themselves, especially if they're fairly specialized or customized.
Agreed on the pay, it would have been good if it wasn't in California.
He retired at 55 and 82 now, he still has no regrets. FWIW, my mom retired from teaching at 53 and is 80.