{"schemaVersion":"jobsearcher.job.v1","id":"28ed2ac666a2e5379bfcccae","url":"https://jobsearcher.com/jobs/28ed2ac666a2e5379bfcccae","canonicalUrl":"https://jobsearcher.com/jobs/28ed2ac666a2e5379bfcccae","title":"Senior Mainframe System Programmer","description":"Mainframe ZOS System ProgrammerPhoenix, AZ (Hybrid)The Mainframe z/OS System Programmer is responsible for the installation, customization, maintenance, and optimization of IBM z/OS operating systems and associated system software. This role ensures the stability, performance, security, and availability of mission-critical mainframe environments, supporting large-scale enterprise applications.* This role requires employees to live in or around the Phoenix, AZ area. You will be responsible to be onsite 3 days a week. We will consider candidates who are willing to relocate to the area.Responsibilities:System Administration & Maintenance:Install, configure, and maintain IBM z/OS operating systems.Perform system upgrades, migrations (e.g., z/OS version upgrades), and apply maintenance (PTFs, APARs, RSUs).Manage IPL processes, system initialization, and configuration (PARMLIB, PROCLIB, SYS1 datasets).Monitor system health and performance using tools such as RMF, SMF, SDSF.Subsystem Support:Install, configure, and support key subsystems:JES2/JES3TSO/E, ISPFUSS (Unix System Services)RACF (in coordination with security teams)Work closely with DB2, CICS, IMS, MQ, and Storage teams for integration and support.Performance & Capacity Management:Analyze system performance metrics and implement tuning improvements.Support capacity planning and resource optimization (CPU, memory, I/O).Evaluate hardware upgrades (e.g., CPU/MIPS growth, z-series enhancements).Problem Management & Troubleshooting:Diagnose and resolve system-related issues, including system abends and failures.Perform root cause analysis for outages and major incidents.Work with IBM and vendors on problem determination and fixes.Automation & Scheduling:Develop and maintain automation using tools such as:System REXX, CLISTSA z/OS, NetViewSupport job scheduling tools (e.g., CA7, Control-M where applicable).Security & Compliance:Support system-level security configurations aligned with RACF policies.Ensure compliance with audit, regulatory, and enterprise security standards.Assist in vulnerability remediation and patching activities.Change & Release Management:Execute changes through ITIL-based processes (ServiceNow or equivalent).Prepare implementation plans, backout procedures, and validation steps.Support weekend maintenance windows and IPL activities.Documentation:Create and maintain technical documentation, including:System configurationsStandard Operating Procedures (SOPs)Disaster Recovery plans","company":"Ipolarity","rawCompany":"ipolarity","city":"Phoenix","state":"AZ","isRemote":false,"isActive":false,"createdAt":"2026-07-01T09:33:58.997Z","occupations":[{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1244.00","title":"Network and Computer Systems Administrators","slug":"network-and-computer-systems-administrators"},{"code":"15-1211.00","title":"Computer Systems Analysts","slug":"computer-systems-analysts"}],"industries":[{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"},{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"541519","title":"Other Computer Related Services","slug":"other-computer-related-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Mainframe System Programmer","description":"Mainframe ZOS System ProgrammerPhoenix, AZ (Hybrid)The Mainframe z/OS System Programmer is responsible for the installation, customization, maintenance, and optimization of IBM z/OS operating systems and associated system software. This role ensures the stability, performance, security, and availability of mission-critical mainframe environments, supporting large-scale enterprise applications.* This role requires employees to live in or around the Phoenix, AZ area. You will be responsible to be onsite 3 days a week. We will consider candidates who are willing to relocate to the area.Responsibilities:System Administration & Maintenance:Install, configure, and maintain IBM z/OS operating systems.Perform system upgrades, migrations (e.g., z/OS version upgrades), and apply maintenance (PTFs, APARs, RSUs).Manage IPL processes, system initialization, and configuration (PARMLIB, PROCLIB, SYS1 datasets).Monitor system health and performance using tools such as RMF, SMF, SDSF.Subsystem Support:Install, configure, and support key subsystems:JES2/JES3TSO/E, ISPFUSS (Unix System Services)RACF (in coordination with security teams)Work closely with DB2, CICS, IMS, MQ, and Storage teams for integration and support.Performance & Capacity Management:Analyze system performance metrics and implement tuning improvements.Support capacity planning and resource optimization (CPU, memory, I/O).Evaluate hardware upgrades (e.g., CPU/MIPS growth, z-series enhancements).Problem Management & Troubleshooting:Diagnose and resolve system-related issues, including system abends and failures.Perform root cause analysis for outages and major incidents.Work with IBM and vendors on problem determination and fixes.Automation & Scheduling:Develop and maintain automation using tools such as:System REXX, CLISTSA z/OS, NetViewSupport job scheduling tools (e.g., CA7, Control-M where applicable).Security & Compliance:Support system-level security configurations aligned with RACF policies.Ensure compliance with audit, regulatory, and enterprise security standards.Assist in vulnerability remediation and patching activities.Change & Release Management:Execute changes through ITIL-based processes (ServiceNow or equivalent).Prepare implementation plans, backout procedures, and validation steps.Support weekend maintenance windows and IPL activities.Documentation:Create and maintain technical documentation, including:System configurationsStandard Operating Procedures (SOPs)Disaster Recovery plans","datePosted":"2026-07-01T09:33:58.997Z","dateModified":"2026-07-01T09:33:58.997Z","hiringOrganization":{"@type":"Organization","name":"Ipolarity","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Phoenix","addressRegion":"AZ","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"28ed2ac666a2e5379bfcccae"},"url":"https://jobsearcher.com/jobs/28ed2ac666a2e5379bfcccae"}}