CaTS Systems Services works at the operating system and the hardware level of the large computer systems. They install, upgrade, tune, and debug the operating systems and application packages on the UNIX and mainframe systems.

The system administrators also monitor system performance and adjust process priorities during times of peak loads, and monitor security events to protect from intruders.

They recommend new hardware for system upgrades, and perform all of the necessary functions to keep the systems up and running smoothly.

Systems Services also consists of Computer Operations and Data Entry.