Haystack
← Back to Jobs
Remote
Technology
AR

Remote Senior z/OS Systems Administrator

Arrowminds incUnited States🇺🇸United StatesPosted 21 Aug 2026

Why This Role Stands Out

Advance your mainframe career with this remote Senior z/OS Systems Administrator role, offering the chance to leverage your deep SMP/E, REXX, and z/OSMF expertise in a dynamic environment. If you thrive on complex system challenges and enjoy automating processes, this is a fantastic opportunity to expand your skills and contribute to critical infrastructure. Apply now to join a forward-thinking team and make a significant impact from anywhere.

Quick Overview

Seniority
Mid Senior
Work mode
Remote
Location
United States
Posted
Yesterday
TCP/IP

Job Description

Title: Remote Senior z/OS Systems Administrator
Location: REMOTE
Duration: 12+ Months Contract
 
Job Description:
Position Overview
We are seeking an experienced Senior z/OS Systems Administrator to support and maintain a large-scale IBM mainframe environment. The ideal candidate will be a senior-level z/OS professional with deep hands-on expertise in SMP/E, REXX scripting, and z/OSMF, along with strong knowledge of z/OS systems administration, maintenance, upgrades, troubleshooting, and automation.
Key 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.
  • Provide advanced administration and troubleshooting of z/OS environments.
  • Use SMP/E (System Modification Program/Extended) extensively for installation, maintenance, upgrades, PTFs, APARs, HOLDDATA processing, and management of IBM and third-party software.
  • Analyze SMP/E environments, zones, CSI datasets, SYSMODs, and maintenance requirements.
  • Develop and maintain REXX scripts to automate z/OS administration, monitoring, reporting, maintenance, and operational processes.
  • Identify manual processes that can be improved through REXX-based automation.
  • Administer and support IBM z/OS Management Facility (z/OSMF).
  • Configure and maintain z/OSMF services, workflows, plugins, and system management functions.
  • Utilize 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.
Required Qualifications
  • 10+ years of hands-on SMP/E experience in enterprise IBM z/OS environments.
  • 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 (z/OS Management Facility).
  • 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.
Preferred Skills
Experience with several of the following would be highly desirable:
  • JES2
  • RACF
  • TCP/IP
  • UNIX System Services (USS)
  • HMC
  • IBM System z / IBM Z hardware
  • Parallel Sysplex
  • Coupling Facility
  • WLM
  • RMF / SMF
  • System Automation
  • SDSF
  • DFSMS
  • Disaster Recovery / Business Continuity
  • Mainframe monitoring and performance-management tools
  • Automation using REXX, JCL, CLISTs, and other scripting technologies

Similar jobs

Browse related jobs

Apply now