Site administrators have more permissions in using the system and that includes adding another site admin to the site.
You can add a user as a site admin b
Click on Admin.
Look for Site administrators under Permissions. Another window will pop out.
3. Click Add.
4. Select users from the drop-down list. Don't forget to click Save.
Please note that only a user with a HosPortal profile can be set as a site admin. If an intended user has no profile then this user needs to be added to the system. Refer to this article on how to add staff.