A glass blower I know at one of the UC campuses makes about $95k. He's mid-career. UC salaries are public record, so I'm sure you can find it if you want to go hunting.
But Caltech records are not. I took Caltech salaries for carpenters from Glassdoor and compared them with median salaries for carpenters in California to get an idea of the university premium/discount. Then applied that to scientific glass blower salaries in California. It's not perfect, but it's at least reasonable.
I could not find a scientific glass blower salary in the California public records system. I looked, perhaps they are titled under something else?
