Mainframe ZOS System Programmer

Install, configure, and maintain IBM z/OS operating systems.

Perform system upgrades, migrations (e.g., z/OS version upgrades), and apply maintenance (PTFs, APARs, RSUs).

Manage IPL processes, system initialization, and configuration (PARMLIB, PROCLIB, SYS1 datasets).

Monitor system health and performance using tools such as RMF, SMF, SDSF.

Install, configure, and support key subsystems:

JES2/JES3

TSO/E, ISPF

USS (Unix System Services)

RACF (in coordination with security teams)

Work closely with DB2, CICS, IMS, MQ, and Storage teams for integration and support.

Analyze system performance metrics and implement tuning improvements.

Support capacity planning and resource optimization (CPU, memory, I/O).

Evaluate hardware upgrades (e.g., CPU/MIPS growth, z-series enhancements).

Diagnose and resolve system-related issues, including system abends and failures.

Perform root cause analysis for outages and major incidents.

Work with IBM and vendors on problem determination and fixes.

Develop and maintain automation using tools such as:

System REXX, CLIST

SA z/OS, NetView

Support job scheduling tools (e.g., CA7, Control-M where applicable).

Support system-level security configurations aligned with RACF policies.

Ensure compliance with audit, regulatory, and enterprise security standards.

Assist in vulnerability remediation and patching activities.

Execute changes through ITIL-based processes (ServiceNow or equivalent).

Prepare implementation plans, backout procedures, and validation steps.

Support weekend maintenance windows and IPL activities.

Create and maintain technical documentation, including:

System configurations

Standard Operating Procedures (SOPs)

Disaster Recovery plans