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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Mainframe Systems Engineer - **Company:** Manpower - **Location:** Chandler, AZ, United States - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** IBM Basic Assembly Language and Successors, Unix, Program Optimization, System Configuration, File Systems, Rexx (Programming Language), Job Entry Subsystem 2/3, Mainframes, Runbook, System Software, Z/OS, Tso/ispf, Scripting, Reliability of Systems, Build Management - **Published:** August 3, 2026 - **Apply:** https://dejobs.org/x/x/391203702C114AA39242DFBA6D133B3C/job/ ## About the Role Our client, a leading organization in the technology sector, is seeking a dedicated and experienced Senior Mainframe Systems Engineer to join their dynamic team. As a Senior Mainframe Systems Engineer, you will be an integral part of the Mainframe Operations Department supporting enterprise-level mainframe infrastructure. The ideal candidate will demonstrate strong problem-solving skills, excellent communication, and a proactive approach to system optimization, which will align successfully in the organization. ## Description * Design, engineer, and maintain z/OS platform tools and services in accordance with enterprise standards, governance, and security policies * Provide subject-matter expertise in z/OS infrastructure, supporting application, infrastructure, and engineering teams with technical consultation and best practices * Translate business and operational requirements into detailed z/OS technical designs, deployment blueprints, standards, and runbooks * Develop and enhance automation, scripts, and tooling to improve system reliability and operational efficiency * Create reusable templates and playbooks to standardize system builds, configurations, and ongoing operations What's Needed? * Extensive experience configuring, maintaining, and supporting the z/OS operating system, including installing releases, applying maintenance, and managing PTFs, APARs, and USERMODs using SMP/E * Proficiency in developing and maintaining system utilities, exits, and automation using REXX and Basic Assembly Language (BAL/Assembler) * Hands-on experience administering z/OS UNIX System Services (USS), including file system management, permissions, scripting, and zFS configuration * Experience configuring and supporting JES2, including job class definitions, initiator management, spool tuning, and workload controls * Strong knowledge of TSO/ISPF, including panel usage, utility execution, and operational support What's in it for me? * Opportunity to work with cutting-edge mainframe technologies in a collaborative environment * Engage in innovative projects that enhance enterprise system performance and reliability * Gain valuable experience supporting high-availability, regulated enterprise environments * Collaborate with a diverse and inclusive team of professionals * Contribute to continuous improvement and modernization initiatives within the organization Upon completion of waiting period consultants are eligible for: * Medical and Prescription Drug Plans * Dental Plan * Vision Plan * Health Savings Account * Health Flexible Spending Account * Dependent Care Flexible Spending Account * Supplemental Life Insurance * Short Term and Long Term Disability Insurance * Business Travel Insurance * 401(k), Plus Match * Weekly Pay ## Related Videos - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Technical Documentation - How Can I Write Them Better and Why Should I Care?](https://www.wearedevelopers.com/videos/681-technical-documentation-how-can-i-write-them-better-and-why-should-i-care) - [WeAreDevelopers LIVE - Node and Package Security](https://www.wearedevelopers.com/videos/2138-wearedevelopers-live-node-and-package-security) - [Bridging AI and Nomad: a Go-based MCP Server for Cluster Control](https://www.wearedevelopers.com/videos/2063-bridging-ai-and-nomad-a-go-based-mcp-server-for-cluster-control) - [The Time Paradox: Building Timezone-Safe Python/Django Applications](https://www.wearedevelopers.com/videos/1915-the-time-paradox-building-timezone-safe-python-django-applications) - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [The Ultimate Software Engineer Career Path Guide for 2023](https://www.wearedevelopers.com/magazine/146-the-ultimate-software-engineer-career-path-guide-for-2023) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)