Mainframe z/OS Systems Programmer

Computer Task Group, Inc•Phoenix, AZ

1d•Hybrid

About The Position

Experienced Mainframe z/OS Systems Programmer responsible for supporting, maintaining, and optimizing IBM z/OS enterprise environments. This role focuses on system reliability, performance tuning, infrastructure upgrades, security compliance, and production support for mission-critical workloads.

Requirements

IBM z/OS systems programming expertise
Strong knowledge of JES2/JES3, RACF, VTAM, TCP/IP, USS, TSO/ISPF
SMP/E maintenance and mainframe software lifecycle management
Performance tuning and capacity planning
REXX, JCL, CLIST scripting/automation
Strong troubleshooting and incident resolution skills
Experience supporting large enterprise mainframe environments
5+ years of experience as a Mainframe z/OS Systems Programmer or similar role
Experience in large enterprise environments (banking, insurance, healthcare, government, retail, transportation preferred)
Proven experience with production support, system upgrades, and performance optimization
Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.

Responsibilities

Install, configure, maintain, and upgrade IBM z/OS operating systems and subsystems
Perform performance tuning, capacity planning, and system optimization
Manage SMP/E maintenance, fixes, patches, and upgrades
Support and troubleshoot system outages, performance issues, and infrastructure problems
Support core mainframe components including JES2/JES3, RACF, TSO/ISPF, USS, VTAM/TCP-IP, and SDSF
Administer batch processing, storage, file systems, and automation tools
Support disaster recovery, high availability, backup, and recovery processes
Develop automation using REXX, JCL, CLIST, or similar tools
Ensure compliance with security, audit, and operational standards
Participate in on-call rotation and incident management