Manage and support DB2 for z/OS subsystems in a mission-critical enterprise environment
Install, configure, and maintain DB2 for z/OS subsystems
Perform version upgrades, patching (PTFs/APARs), and system maintenance
Manage subsystem configuration and initialization parameters
Maintain core DB2 components: ZPARMs (DSNZPARM), Buffer pools, Logs and BSDS, Catalog and directory
Monitor and tune DB2 system-level performance (CPU, memory, I/O)
Optimize: Buffer pools, Locking and concurrency, Thread and connection performance
Support capacity planning and performance analysis using DB2 and system tools
Manage and support DB2 Data Sharing environments (Sysplex)
Ensure DB2 availability and resilience through DR strategies
Analyze and resolve subsystem failures, connectivity issues affecting DB2 operations
Perform root cause analysis and implement preventive actions
Support interaction with: Batch (JCL), CICS, IMS, MQ and distributed systems

7–12+ years of mainframe experience
3–5+ years in DB2 Systems Programming / Administration
Experience with IBM DB2 for z/OS and Replication products (Qrep, SQLrep and CDC)
software installation, version upgrades and maintenance, certification testing, documentation of operational procedures, disaster recovery testing
Deep knowledge of: ZPARMs and subsystem configuration
Buffer pools, logs, BSDS, catalog/directory
Strong troubleshooting skills for: System-level DB2 issues
Performance and connectivity problems
Proficiency in: JCL, TSO/ISPF, SDSF
SMP/E (preferred)

Mainframe Administrator

Key skills