What is a mainframe systems engineer?

Mainframe Systems Engineers are IT professionals who design, implement, manage, and maintain mainframe computer systems used by large organizations for critical applications and data processing. They ensure the mainframe environment runs efficiently, securely, and reliably, handling tasks such as system upgrades, performance tuning, troubleshooting, and disaster recovery. Mainframe Systems Engineers often work with operating systems like IBM z/OS, manage storage and networking, and provide technical support for mainframe-based applications.