Mainframe Z/Os System Programmer

Mainframe z/OS System Programmer

Location: Phoenix Metro, AZ
Work Model: Hybrid – 3 days onsite per week
Relocation: Candidates willing to relocate will be considered.

Role Summary

Seeking a highly skilled Mainframe z/OS System Programmer responsible for installation, customization, maintenance, troubleshooting, performance optimization, and security support of IBM z/OS and associated system software.

Key Responsibilities

z/OS Administration

• Install, configure, maintain, and upgrade IBM z/OS.
• Perform z/OS version upgrades and migrations.
• Apply PTFs, APARs, and RSUs.
• Manage IPL processes and system initialization.
• Maintain PARMLIB, PROCLIB, and SYS1 datasets.
• Monitor system health using RMF, SMF, and SDSF.

Subsystem Support

• JES2/JES3
• TSO/E
• ISPF
• USS
• RACF
• DB2
• CICS
• IMS
• MQ
• Storage

Performance & Capacity

• Analyze CPU, memory, and I/O utilization.
• Perform system-level tuning.
• Support capacity planning.
• Evaluate CPU/MIPS growth and hardware upgrades.

Problem Management

• Diagnose system abends and failures.
• Perform root-cause analysis.
• Work with IBM and vendors on problem resolution.

Automation

• System REXX
• CLIST
• SA z/OS
• NetView
• CA7 / Control-M

Change Management

• Support ITIL/ServiceNow processes.
• Prepare implementation/backout plans.
• Support weekend maintenance and IPL activities.

Required Experience

• Strong IBM z/OS System Programming experience.
• z/OS installation, maintenance, upgrades, and troubleshooting.
• JES2/JES3, TSO/ISPF, USS.
• PARMLIB/PROCLIB.
• IPL and system initialization.
• RMF/SMF/SDSF.
• PTF/APAR/RSU maintenance.
• Strong JCL and mainframe troubleshooting skills.