zOS Systems Programmer

Executive Summary:

The client is looking for an experienced z/OS Systems Programmer to support maintain and enhance the clients IBM mainframe environment ensuring the stability security and performance of mission-critical systems.

Position Description: We are seeking an experienced z/OS Systems Programmer to support maintain and enhance the clients IBM mainframe environment. The ideal candidate will have deep technical expertise in z/OS subsystem configuration system tuning and operational support in a mission critical environment. This role ensures the stability security and performance of mainframe systems across production test and development environments.

Position Job Duties:

• z/OS Installation & Maintenance: Install configure and maintain z/OS and related IBM system software; manage SMP/E processes and PTF/RSU installations; maintain PARMLIB/PROCLIB and plan IPLs.
• Subsystem Administration: Support and tune subsystems such as JES2/JES3 CICS DB2 MQ and IMS; troubleshoot subsystem issues to ensure performance and availability.
• Performance & Capacity Management: Perform workload analysis using RMF/SMF; tune WLM policies; provide recommendations to optimize CPU memory I/O and storage utilization.
• Storage & I/O Configuration: Work with storage teams on SMS/HSM and DASD management; support IODF/HCD updates; validate TS7700/VTL replication.
• Security & Compliance: Support RACF rules and digital certificates; assist with STIG compliance and vulnerability remediation; ensure configurations align with regulatory standards.
• Automation & Operations: Develop automation scripts (REXX CLIST SA/Ops); support job scheduling; integrate with monitoring and alerting tools.
• Incident & Change Management: Provide Tier III support for escalated issues; conduct root cause analysis (RCA); participate in change management and DR tests.
• Documentation & Collaboration: Create technical documentation and SOPs; collaborate with cross-functional teams; assist in modernization and cloud integration initiatives.

Hybrid (2 days on-site)

Experience required:

Required Qualifications:

• Active Secret Clearance
• 8 years of hands-on experience as a z/OS Systems Programmer
• Deep understanding of z/OS internals JES2/JES3 WLM SMP/E
• Experience with one or more subsystems (CICS DB2 IMS MQ)
• Strong diagnostic and problem-solving skills
• Experience with REXX JCL and mainframe utilities
• Knowledge of TCP/IP VTAM and network configuration on z/OS
• Experience with DR backup/restore and high availability environments
• Strong analytical and troubleshooting skills
• Excellent communication and documentation abilities
• Ability to work in 24x7 mission-critical environments
• Collaborative team player with a focus on quality and reliability
• Ability to adapt and learn emerging mainframe and automation technologies

Desired Qualifications:

• Experience with z/OSMF Ansible for z/OS and automation frameworks
• Exposure to security tools (zSecure) and RACF administration
• Mainframe experience in a cloud MFaaS or hosting environment
• Familiarity with federal compliance frameworks (NIST STIG RMF)
• Bachelors degree in computer science Information Systems or equivalent experience

ATD Technology LLC is a certified minority woman owned business that creates opportunities to match qualified individuals with client programs while meeting all parties financial and technical goals. ATD is a full service provider with offerings in Contract Permanent and Temp-to-Perm staffing solutions. We serve Fortune 1000 mid cap and small cap companies in the Commercial Public and Government sectors.