Mainframe Administrator

We are seeking a highly skilled Mainframe DB2 Systems Administrator to manage and support DB2 for z/OS subsystems in a mission-critical enterprise environment. This role is responsible for installation, configuration, performance tuning, and overall health of DB2 subsystems, ensuring high availability, security, and optimal performance., DB2 Installation & Configuration

• 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

Performance & Capacity Management

• 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

High Availability & Data Sharing

• Manage and support:

• DB2 Data Sharing environments (Sysplex)
• Coupling Facility integration
• Workload balancing and failover

• Ensure DB2 availability and resilience through DR strategies

System Maintenance & Troubleshooting

• Analyze and resolve:

• Subsystem failures
• Dumps, logs, and abends
• 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)

Preferred Qualifications:

• Familiarity with:

• DB2 utilities and performance tools
• Monitoring tools (OMEGAMON, MainView)

• Knowledge of:

• DevOps tools for mainframe (Endevor, ISPW, etc.)

• Exposure to:

• Cloud integration or hybrid architectures

• Experience with:

• Large-scale DB2 upgrades or migrations
• Performance optimization initiatives

• Knowledge of:

• Modernization tools (z/OS Connect, APIs)

• Experience with software support for BMC for DB2 Tools, IBM z/OS Connect, Software AG ADABAS and Natural products
• Programming experience with REXX
• Working knowledge of SQL, JIRA, SMP/E, RACF, TCP/IP, Network certificates, Splunk
• Working knowledge of other Mainframe Subsystems (CICS, IMS, MQ)