Mainframe CICS System Administrator

We are seeking an experienced Mainframe CICS System Administrator to install, configure, maintain, and optimize IBM CICS Transaction Server environments. The ideal candidate will have strong hands-on experience in CICS systems administration, region management, software upgrades, performance monitoring, and troubleshooting in enterprise mainframe environments.

Key Responsibilities

CICS Administration & Maintenance

• Install, configure, upgrade, and maintain IBM CICS Transaction Server (CICS TS) environments.

• Apply IBM PTFs, maintenance packages, and software fixes.

• Manage CICS version upgrades and perform regression testing and validation.

• Configure and maintain CICS regions across production, test, development, and disaster recovery environments.

• Maintain CICS startup parameters and System Initialization Tables (DFHSIT).

• Monitor CICS region availability and ensure system stability and reliability.

• Troubleshoot CICS system issues and coordinate with mainframe infrastructure and application teams.

Performance Monitoring & Tuning

• Monitor CICS transaction performance, system health, and resource utilization.

• Use monitoring tools such as OMEGAMON, BMC MainView, and TMON.

• Analyze transaction response times, CPU utilization, storage usage, and system bottlenecks.

• Perform performance tuning to improve transaction throughput and response times.

• Investigate performance degradation and implement corrective actions.

System Support & Troubleshooting

• Diagnose and resolve CICS region failures, transaction issues, and system-level errors.

• Support production incidents, root-cause analysis, and problem resolution.

• Maintain operational documentation, system procedures, and configuration standards.

• Support disaster recovery activities and ensure operational readiness.

• Collaborate with z/OS system programmers, DB2 administrators, and application development teams.

Required Skills

• Strong hands-on experience with IBM CICS Transaction Server (CICS TS).

• Experience installing, maintaining, upgrading, and supporting CICS environments.

• Knowledge of CICS regions, DFHSIT parameters, and startup procedures.

• Experience applying PTFs and performing maintenance upgrades.

• Expertise in CICS performance monitoring and tuning.

• Experience with OMEGAMON, MainView, or TMON.

• Strong troubleshooting and production support skills.

• Understanding of IBM z/OS mainframe environments.