A system administrator is an essential IT professional who is responsible for providing a reliable work environment for an organization—from server and network performance to security and all other areas that keep an organization’s IT systems running smoothly. System administrators must have an in-depth understanding of computer software, hardware, and networks and are highly skilled, valuable members of an organization.

At a high level, system administrators are responsible for system performance, design, and reliability and the security and optimization of computer systems. The breadth of these responsibilities is dependent upon the size and scale of an organization’s IT-related infrastructure.

The system administrator’s responsibilities are diverse and involve many areas of an organization’s technology systems. This IT professional may be responsible for some, or all the areas listed below, depending on an organization’s structure and scope:

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