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.
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/JES
* 3TSO/E, ISP
* FUSS (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)
* :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, CLIS
* wSupport 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
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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/JES
* 3TSO/E, ISP
* FUSS (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)
* :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, CLIS
* wSupport 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
#J-18808-Ljbffr
Mainframe Programmer in phoenix at Unknown Company
This position is listed as full time and onsite.