I am a Site Admin. Why am I unable to assign certain Job Admin levels to other users?

Site Admins can assign another user only to a Job Admin level which does not include any permissions the Site Admin does not have themselves.

If a Job Admin level includes one or more permissions the Site Admin does not have, the Site Admin will not see that Job Admin level available when assigning job-based permissions to Job Admin users. 

Example: A Site Admin who lacks the user-specific permission Can see private notes, salary info, manage offers, request approval, and approve jobs/offers cannot assign another user to a Job Admin level which includes the Can view and edit private candidate and application fields permission stripe. 

To learn how to check your own user permissions, please see the following article: View permissions on personal user account