Mainframe z/OS System Programmer

Mainframe z/OS System Programmer

Locations: Phoenix, AZ
Work Model: Hybrid / Onsite 3 days per week
Relocation: Candidates willing to relocate to Phoenix will be considered.

Role Overview

Seeking an experienced Mainframe z/OS System Programmer responsible for installation, customization, maintenance, performance optimization, security, and availability of IBM z/OS and associated system software.

Key Responsibilities

z/OS Administration & Maintenance

Install, configure, and maintain IBM z/OS.
Perform z/OS upgrades, migrations, and maintenance.
Apply PTFs, APARs, RSUs, and other system maintenance.
Manage IPLs and system initialization.
Maintain PARMLIB, PROCLIB, and SYS1 system datasets.
Monitor system health using RMF, SMF, SDSF, and related tools.
Subsystem Support

Install, configure, and support:
JES2/JES3
TSO/E
ISPF
USS
RACF
Collaborate with DB2, CICS, IMS, MQ, and Storage teams.
 

Performance & Capacity

Analyze system performance and implement tuning improvements.
Support capacity planning and resource optimization.
Analyze CPU, memory, and I/O utilization.
Support hardware and capacity planning activities.
Problem Management

Diagnose system failures, abends, and performance issues.
Perform root-cause analysis for outages and major incidents.
Work with IBM and software vendors on problem resolution.
Automation

Develop and maintain automation using:
REXX
CLIST
SA z/OS
NetView
Support scheduling tools such as CA-7 and Control-M.
Security & Compliance

Support RACF and system-level security configurations.
Assist with vulnerability remediation and patching.
Support enterprise security and audit requirements.
Change & Documentation

Execute changes through ITIL/ServiceNow processes.
Prepare implementation, validation, and backout plans.
Support maintenance windows and IPL activities.
Maintain system documentation, SOPs, and DR procedures