> Markdown version of [/jobs/ext/1451301-sr-mainframe-systems-programmer](https://www.wearedevelopers.com/jobs/ext/1451301-sr-mainframe-systems-programmer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Mainframe Systems Programmer - **Company:** Ericsson - **Location:** Morristown, NJ, United States (Remote available) - **Experience:** Expert - **Salary:** $140,000.0 - $207,900.0 - **Contract:** Permanent contract - **Skills:** Computing Platforms, Job Entry Subsystem 2/3, Mainframes, Performance Tuning, IBM Resource Access Control Facility, Software Project Management, Z/OS, Tso/ispf, System Availability, Software Troubleshooting - **Published:** July 26, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=9ea80359027b3563 ## About the Role * U.S. Citizenship is required * At least 10 years of hands-on z/OS experience, with current expertise aligned to z/OS 3.1 * Deep knowledge of z/OS architecture, RACF security administration, and SMP/E maintenance and software management * Proven experience leading mainframe migration and upgrade projects * Strong analytical and problem-solving skills in complex technical environments * Demonstrated expertise in performance tuning and capacity planning It would be nice if you also have: * Experience with Connect:Direct is a plus * Strong communication skills and ability to collaborate effectively across teams * Self-directed research ability with a proactive, solutions-focused approach * Eagerness to learn and adapt in a dynamic environment ## Description We are seeking a Senior Mainframe Systems Programmer to join a collaborative team supporting Ericsson's IBM z/OS-based mainframe infrastructure. The team manages mainframe hardware and software platforms, maintains software currency, and ensures systems remain reliable, secure, and high performing. In this role, you will work alongside experienced mainframe professionals to implement new technologies and support an internal community of Ericsson application developers and testers - enabling solutions used by Tier 1 telecommunications carriers across North America., * Provide technical leadership across all aspects of the z/OS platform, ensuring high availability, performance, and security * Collaborate with a small, specialized engineering team to deliver critical infrastructure initiatives * Lead evaluation, installation, customization, and migration efforts for new z/OS releases and components * Troubleshoot complex technical issues and drive resolution across integrated mainframe environments * Ensure compliance with internal IT policies, standards, and security requirements * Optimize system performance through capacity planning and performance management * Support and upgrade key z/OS subsystems: JES2 (including local exits), TSO/ISPF (including local customizations), RACF, SMS, HCD, and SMF/RMF * Design, implement, and manage RACF security environments, including day-to-day administration and strategic enhancements Note: Due to the requirements of the National Security Agreement (CFIUS), only U.S. Citizens are eligible for this position., DISCLAIMER: The above statements are intended to describe the general nature and level of work being performed by employees in this position. They are not an exhaustive list of all responsibilities, duties and skills required for this position, and you may be required to perform additional job tasks as assigned. ## Related Videos - [".Net is too slow" was not an option](https://www.wearedevelopers.com/videos/100176-net-is-too-slow-was-not-an-option) - [Cloud as the new mainframe: why the cloud hype does not reflect the dev reality](https://www.wearedevelopers.com/videos/797-cloud-as-the-new-mainframe-why-the-cloud-hype-does-not-reflect-the-dev-reality) - [Building with IBM Bob](https://www.wearedevelopers.com/videos/100275-building-with-ibm-bob) - [Migrating from COBOL with AI: A Moonshot Demo](https://www.wearedevelopers.com/videos/1531-migrating-from-cobol-with-ai-a-moonshot-demo) - [Goodbye Microservices, Hello Self-Contained Systems](https://www.wearedevelopers.com/videos/100009-goodbye-microservices-hello-self-contained-systems) - [Grappling With Clunky Old Software? Start by Understanding What’s Inside!](https://www.wearedevelopers.com/videos/1189-grappling-with-clunky-old-software-start-by-understanding-what-s-inside) ## 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) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Résumé-Driven Development: How IT trends affect the job market for software developers](https://www.wearedevelopers.com/magazine/59-resume-driven-development-how-it-trends-affect-the-job-market-for-software-developers) - [10 Highest Paying Programming Languages 2025](https://www.wearedevelopers.com/magazine/150-10-highest-paying-programming-languages-2025) - [Where to Find Entry-Level Software Engineering Jobs](https://www.wearedevelopers.com/magazine/397-where-to-find-entry-level-software-engineering-jobs)