What is IBM mainframe system administration?

IBM Mainframe System Administration involves managing, configuring, and maintaining mainframe computer systems, such as IBM zSeries. Administrators are responsible for ensuring the reliability, availability, and security of mainframe environments, which are critical for large enterprises. Their duties include system monitoring, performance tuning, software installation, backup and recovery, and troubleshooting hardware or software issues. Mainframe system administrators often work with operating systems like z/OS and manage resources such as storage, networks, and user accounts.