Mainframe ZOS System Programmer (Hybrid) || Phoenix Arizona 85027 (Hybrid – 3 daysweek onsite)

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Hope you are doing well

Please find the job description below and let me know your interest.

Job Title: Mainframe ZOS System Programmer (Hybrid)

Location: Phoenix Arizona 85027 (Hybrid 3 days/week onsite)

Duration: 12 Months

Note:- Do not share Application Developer/Programmers need Systems Programmers; look for SMP or SMPE or SMP/E and Parallel Sysplex.

Job Description:

The Mainframe z/OS System Programmer is responsible for the installation customization maintenance and optimization of IBM z/OS operating systems and associated system software. This role ensures the stability performance security and availability of mission-critical mainframe environments supporting large-scale enterprise applications.

System Administration & Maintenance:

• 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 and SDSF.

Subsystem Support:

• Install configure and support key subsystems:

o JES2/JES3

o TSO/E ISPF

o USS (Unix System Services)

o RACF (in coordination with security teams)

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

Performance & Capacity Management:

• 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).

Problem Management & Troubleshooting:

• 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.

Automation & Scheduling:

• Develop and maintain automation using tools such as:

o System REXX CLIST

o SA z/OS NetView

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

Security & Compliance:

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.

Change & Release Management:

• Execute changes through ITIL-based processes (ServiceNow or equivalent).
• Prepare implementation plans backout procedures and validation steps.
• Support weekend maintenance windows and IPL activities.

Documentation:

• Create and maintain technical documentation including:

o System configurations

o Standard Operating Procedures (SOPs)

o Disaster Recovery plans

If you are interested please share your updated resume and suggest the best number & time to connect with you

Thanks & Regards