You may find that information in the National Archive or any local archives in California.
Maybe an online search will produce better findings
This site is a museum run by the NPS. The women that were employed during WWII were hired by private companies, not at this site. I doubt that employment records are here. If you ask a Rosie on Friday's, maybe they might be able to direct you to a company or two that still might hold that information.
It is small but very nice! They also have the Oldest Park Ranger in California working there, her name is Betty Reid Soskin a nice and sweet Lady.
Not that is apparent. Contact the museum staff.
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