Can a Customer have multiple employer profiles within the same company?

Yes, it is possible for a company admin to have multiple employer profiles within the same company. Each employer profile within the same company will show up as different profiles in the profile switcher. When you sign in, you will be able to switch seamlessly between the profiles without the need to re-authenticate. 

Please note that assigning the same email to different roles within the same company can result in conflicting notifications. For example, if somebody is Super admin but also Viewer, they will receive emails addressed to Super admins.

See also: Can I change a company user's role?