Professors in US (and Cal-State too) are

State (CA) employees. In CA, State and many counties, cities employees can take up to 80% pension if you work for 20-25 years.

Many private companies' pension are up to 20-25%. (20-30 years of service) Mine is the same, with one condition, when you retire, the company still exist or not being bought by other company. So I am not counting on the pension on a private company.