Senior z/OS Systems Administrator (100% Remote)
About The Position
We are seeking an experienced Senior z/OS Systems Administrator to support and maintain a large-scale IBM mainframe environment. The role requires deep hands-on expertise in SMP/E, REXX scripting, and z/OSMF, together with strong knowledge of z/OS systems administration, maintenance, upgrades, troubleshooting, and automation. This position is listed as 100% remote and has a duration of 6+ months. The administrator will install, configure, maintain, and support IBM z/OS operating systems and related system software; manage upgrades and lifecycle maintenance; and provide advanced troubleshooting and problem resolution. The role also includes extensive use of SMP/E for IBM and third-party software, developing REXX automation, administering z/OSMF, monitoring system health, coordinating with infrastructure and application teams, maintaining technical documentation, and providing technical leadership. Participation in production support and on-call activities is required as needed.
Requirements
- At least 10 years of hands-on SMP/E experience in enterprise IBM z/OS environments.
- At least 10 years of hands-on REXX scripting experience, including development of automation for systems administration and operational tasks.
- Strong hands-on experience with IBM z/OSMF.
- Extensive experience administering and supporting IBM z/OS in large enterprise environments.
- Strong knowledge of z/OS system architecture, configuration, maintenance, and troubleshooting.
- Experience installing and maintaining IBM and third-party mainframe software.
- Extensive experience applying PTFs, APARs, maintenance packages, and software upgrades using SMP/E.
- Strong understanding of SMP/E CSI structures, zones, SYSMOD processing, HOLDDATA, RECEIVE, APPLY, ACCEPT, and RESTORE processes.
- Strong knowledge of JCL, TSO/ISPF, UNIX System Services (USS), and z/OS utilities.
- Ability to diagnose complex system problems using z/OS logs, dumps, system messages, and diagnostic tools.
- Strong understanding of mainframe change-management and production-control processes.
- Excellent analytical, troubleshooting, documentation, and communication skills.
- Ability to work independently and take ownership of complex technical issues.
Nice To Haves
- Experience with JES2.
- Experience with RACF.
- Experience with TCP/IP.
- Experience with UNIX System Services (USS).
- Experience with HMC.
- Experience with IBM System z / IBM Z hardware.
- Experience with Parallel Sysplex and Coupling Facility.
- Experience with WLM.
- Experience with RMF / SMF.
- Experience with System Automation.
- Experience with SDSF.
- Experience with DFSMS.
- Experience with Disaster Recovery / Business Continuity.
- Experience with mainframe monitoring and performance-management tools.
- Experience with automation using REXX, JCL, CLISTs, and other scripting technologies.
Responsibilities
- Install, configure, maintain, and support IBM z/OS operating systems and related system software.
- Perform z/OS upgrades, maintenance, system modifications, and lifecycle management.
- Administer and troubleshoot z/OS environments and resolve complex system issues.
- Use SMP/E to install, maintain, and upgrade IBM and third-party software, including processing PTFs, APARs, and HOLDDATA.
- Analyze SMP/E environments, zones, CSI datasets, SYSMODs, and maintenance requirements.
- Develop and maintain REXX scripts to automate administration, monitoring, reporting, maintenance, and operational processes.
- Identify manual processes that can be improved through REXX-based automation.
- Administer and support z/OSMF, including configuring and maintaining services, workflows, plugins, and system management functions.
- Use z/OSMF for system management, configuration, monitoring, and automation.
- Perform system problem determination, root-cause analysis, and resolution of complex z/OS issues.
- Monitor system performance, availability, capacity, and overall system health.
- Work with operations, application, storage, network, security, and database teams to resolve mainframe infrastructure issues.
- Participate in system upgrades, migrations, disaster recovery testing, and infrastructure modernization initiatives.
- Maintain system documentation, operating procedures, configuration standards, and technical runbooks.
- Provide technical leadership and mentoring to other mainframe systems administrators.
- Participate in production support and on-call activities as required.
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What This Job Offers
Career Level
Senior
Education Level
No Education Listed
