Mainframe IMS System Programmer

Mainframe IMS System Programmer

The IMS System Programmer is responsible for the installation, customization, maintenance, and support of IBM’s Information Management System (IMS) environment on the z/OS mainframe platform. The role ensures high availability, performance, and security of IMS subsystems, coordinates system upgrades, and provides technical expertise for application teams using IMS databases and transaction managers.

Roles & Responsibilities

System Installation & Maintenance

• Install, configure, and maintain IMS (DB and TM) subsystems, tools, and associated products (e.g., IMS Connect, IMS Tools, ODBM, BMPs).
• Perform system upgrades, maintenance (APARs/PTFs), and migrations to newer IMS versions.
• Manage SMP/E environments for maintenance and software installation.
• Ensure compatibility between IMS, z/OS, DB2, CICS, and related products.

Performance & Capacity Management

• Monitor IMS system performance and tune parameters for optimal throughput and response times.
• Conduct capacity planning and growth analysis to ensure scalability and reliability.
• Utilize tools like OMEGAMON, Mainview, or RMF for performance tracking and problem diagnosis.

System Support & Troubleshooting

• Provide Level 3 technical support for IMS incidents and system abends.
• Diagnose and resolve IMS database recovery, log, and buffer issues.
• Collaborate with IBM support (PMRs, cases) for complex issues and patches.

Database Administration Support

• Support IMS DBA and application teams with DBD, PSB, and ACBGEN processes.
• Maintain IMS catalog and RECON datasets; ensure proper backup/recovery strategy.
• Manage IMS utilities such as DFSURGU0, DFSURWF0, and HALDB tools.

Automation & Integration

• Develop and maintain automation scripts using REXX, CLIST, or JCL for operational efficiency.
• Integrate IMS with monitoring tools, scheduling systems, and middleware (MQ, Connect).
• Support modernization initiatives such as IMS Open Database or REST API integration.

Disaster Recovery & Compliance

• Participate in DR planning, testing, and documentation of IMS recovery procedures.
• Ensure adherence to change management, audit, and compliance standards.

Documentation & Collaboration

• Maintain detailed system configuration and maintenance documentation.
• Provide mentorship to junior system programmers and cross-train peers.
• Work closely with database administrators, application developers, and infrastructure teams.

Other skills

• Experience with IMS integration to distributed systems (IMS Connect, JDBC, ODBM).
• Familiarity with z/OSMF, z/OS Connect EE, or API enablement initiatives.
• Knowledge of mainframe storage management (DFSMS, VSAM).
• Strong problem-solving, debugging, and performance analysis skills.