System admins can view, add, invite or remove other system admins using the admin panel.
System admins with root access are root system admins. Root system admins cannot be removed and can be used to bootstrap the system, as they're added automatically. Your cluster setup guide will include the script to assign root system admins. For installations fully managed by Verta, please contact our support team to set up root system admins.
Note that system admins with root level access cannot be deleted via Web UI (the delete button in system admin management view will be disabled for such users).