In larger organizations the system administrators are sometimes organized into teams with specific responsibilities, some of these include the following:

• Installation/Hardware
• Backups                                                                                                                                                                                           
• Operations

The installation/hardware teams generally build images and spec out the hardware for specific solutions. They will put the server image on the hardware and rack it up for the other teams in the datacenter.

The operation teams will handle day to day workload on the servers managing users and performance of the servers online. They would also handle escalated helpdesk issues that require greater security or server knowledge.

The backup teams will manage and coordinate the backup strategy for the servers and applications.
They will check the integrity of the backups and status of the jobs making sure to fix any problems that may arise. Restores are also done by this team for user and application data as needed.