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Mainframe Administrator

IPolarity LLC

Whippany, NJ • On-site

Part-time

Re-posted 4 days ago


Job description

Mainframe DB2 Systems Programmer
Phoenix, AZ (Hybrid)
Plano, TX
Charlotte, NC
Richmond, VA
Jacksonville Beach, FL
Pennington, NJ
Chicago, IL
The Role:
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.
Responsibilities:

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 
Required Qualifications:
  • 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)

Best Regards,
Naresh J | Team Lead
M 732 640 5076 | Jnaresh@ipolarityllc.com
https://www.linkedin.com/in/naresh-janapati-53ab8576/
200 Centennial Ave, Suite 204, Piscataway, NJ 08854

Flexible work from home options available.