If you're a Control Center system administrator, you can create additional system administrators. System administrators have access to all your organization's Control Center functionality. They can access all accounts, create new users, change user permissions, and change accounts assigned to users.
There's no limit to the number of system administrators your organization can have. Some organizations make everyone a system administrator; others limit access based on a user's job function. For example, people who work with billing only have access to billing tasks and can't submit repair tickets.