z/OS Systems Programmer / Mainframe Systems Programmer

Job Title

Senior z/OS Systems Programmer / Mainframe Systems Programmer

Location

Atlanta, GA - Day 1 Onsite

Role Summary

Responsible for supporting and maintaining the z/OS 3.1 mainframe environment across multiple LPARs, with strong focus on system software availability, reliability, upgrades, performance, and security. This role requires hands-on ownership of the operating system, associated IBM and third-party software, and coordination with application and infrastructure teams to keep production stable. Atlanta-based mainframe roles commonly appear in the market as onsite or remote-with-location positions, so "Day 1 onsite" is the clearest way to position this JD for hiring teams and recruiters.

Key Responsibilities

• Monitor system software access, performance, and resource utilization.

• Maintain the z/OS 3.1 and JES2 software environment.

• Support application teams to ensure issues do not impact production operations.

• Provide 24/7/365 support, including after-hours on-call coverage.

• Install, customize, and maintain IBM and third-party software using SMP/E and mainframe utilities.

• Manage z/OS PARMLIB, HCD, USS file systems, mount points, and NFS-related support.

• Perform upgrades, maintenance, and resiliency exercises across multiple LPARs and datacenters.

• Analyze SYSLOGs, traces, dumps, and monitoring data to resolve system and product issues.

• Support backup, recovery, business recovery testing, and disaster recovery readiness.

• Coordinate with IBM and ISV vendors for problem determination and resolution.

• Use ServiceNow for incident and request tracking.

• Support Broadcom and BMC product maintenance, along with IBM monthly maintenance and RSU processing.

Required Skills

• 10+ years of mainframe software management experience, especially on z/OS.

• Strong knowledge of SMP/E, z/OSMF, JCL, IBM utilities, and mainframe debugging tools.

• Experience with CICS, DB2, MQ, Connect:Direct, CAMS/CAMIM, JES2, USS, and related subsystems.

• Experience with hardware configuration using HCD on IBM z16/zNext platforms.

• Ability to write, read, and debug batch and online programs.

• Strong understanding of security authorization, backup/recovery, and system standards.

• Ability to work independently, handle multiple priorities, and support emergency situations.

• Willingness to work variable hours and possibly travel as needed.

Preferred Experience

• z/OS 3.1 operating system support on IBM z16 processors.

• z/OSMF software management and automated rollout packaging.

• Performance monitoring using RMF, SYSVIEW, and Tivoli Omegamon.

• Experience with storage, networking, production control, change control, and system automation teams.

• Experience supporting multi-datacenter failover and resiliency exercises.