Mainframe CICS System Administrator

CICS Administration & Maintenance

• Install, configure, upgrade, and maintain CICS Transaction Server (CICS TS) environments.
• Apply PTFs, maintenance fixes, and APARs and perform regression validation.
• Configure and maintain CICS regions across Production, Test, Development, and DR environments.
• Maintain DFHSIT (System Initialization Table) and CICS startup parameters.
• Manage CICS region startup/shutdown and system initialization procedures.
• Configure and maintain CICS System Definition (CSD) and resource definitions.
• Administer CICS resources including TRANSACTION, PROGRAM, FILE, TDQUEUE, TSQUEUE, TCP/IP, and CONNECTION/SESSION definitions.
• Support CICS region cloning and configuration changes.

Production Support & Troubleshooting

• Monitor CICS regions and troubleshoot transaction abends, hangs, storage violations, timeouts, and performance issues.
• Analyze CICS dumps, SYSLOG, CICS messages, job logs, and trace data to identify root causes.
• Troubleshoot CICS availability, connectivity, and transaction-processing issues.
• Participate in 24x7 production support/on-call rotation as required.
• Perform root-cause analysis and implement permanent fixes.

Performance & Capacity

• Monitor and tune CICS region performance, storage, CPU utilization, transaction response time, and resource usage.
• Analyze CICS statistics and performance data to identify potential capacity or performance issues.
• Work with DB2, MQ, z/OS, Storage, Network, and Application teams to resolve cross-platform issues.

Integration & Modernization

• Support CICS integrations with DB2, IBM MQ, VSAM, TCP/IP, and other mainframe subsystems.
• Support modernization initiatives involving CICS web services, APIs, and distributed-system connectivity.
• Participate in CICS version upgrades, migration, disaster recovery, and high-availability initiatives.