Job Description


Job Description:
  • The Mainframe z/OS Systems Programmer is responsible for the installation, upgrade, maintenance, and optimization of the z/OS operating system and associated ISV products.
  • This role ensures system stability, performance, security, and high availability while supporting critical business workloads.
    • Responsibilities:

    z/OS Upgrades and Maintenance:

  • Plan, prepare, and execute z/OS operating system upgrades, including pre-installation checks, customization, testing, and post-upgrade validation.
  • Apply IBM PTFs and APARs using SMP/E to maintain system integrity and resolve issues.
  • Perform regular IPLs and system restarts as required.
  • Monitor system health, performance, and resource utilization using RMF, SMF, Omegamon, and related tools.
    • ISV Product Management:
  • Install, configure, upgrade, and maintain ISV products across security, performance monitoring, scheduling, storage management, databases, and utilities.
  • Ensure compatibility and smooth integration of ISV products within the z/OS environment.
  • Coordinate with vendors for licensing, technical support, and problem resolution.
    • System Maintenance and Support:
  • Perform system reconfigurations and PARMLIB updates.
  • Manage critical system datasets such as SYSRES, page datasets, and SMF datasets.
  • Provide expert-level incident support, including problem determination and resolution.
  • Participate in on-call rotation to support critical systems.
    • Performance Tuning and Optimization:
  • Analyze performance metrics to identify bottlenecks and improvement opportunities.
  • Tune z/OS components, WLM, and ISV products to optimize system and application performance.
    • Automation and Scripting:
  • Develop and maintain REXX, JCL, and automation scripts for system administration and monitoring.
    • Disaster Recovery and Business Continuity:
  • Participate in disaster recovery planning, testing, and execution.
  • Ensure high availability and recoverability of mainframe systems.
    • Documentation and Best Practices:
  • Create and maintain system documentation including installation guides, configurations, procedures, and troubleshooting references.
  • Follow ITIL best practices for change, incident, and problem management.
    • Collaboration and Mentorship:
  • Work closely with application teams, DBAs, operations, and infrastructure groups.
  • Mentor junior systems programmers and promote knowledge sharing.
    • Security and Compliance:
  • Implement and enforce z/OS and ISV security best practices.
  • Ensure compliance with internal policies and regulatory requirements.
    • Required Skills and Experience:
  • Extensive hands-on experience as a Mainframe Systems Programmer.
  • Strong expertise in z/OS installation, configuration, maintenance, and upgrades.
  • Proven experience executing major z/OS version upgrades.
  • Proficiency in JCL, TSO/ISPF, SMP/E, JES2/JES3.
  • Hands-on experience supporting ISV products across security, monitoring, scheduling, storage, database, and utility domains.
  • Solid understanding of mainframe networking including TCP/IP and VTAM.
  • Experience with performance tuning, capacity planning, and automation.
  • Strong analytical, troubleshooting, and communication skills.
  • Ability to work independently and collaboratively in a fast-paced environment.
    • Desired Skills and Experience:
  • Experience with Parallel Sysplex environments.
  • Knowledge of z/VM or Linux on Z.
  • Exposure to mainframe modernization or hybrid cloud initiatives.
  • Relevant z/OS or mainframe technology certifications preferred.

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