Sr. Mainframe Systems Programmer

## Grow With Us Ericsson Inc. does not sponsor U.S work authorizations for this job position including U.S. immigration filings for initial and/or change of employer paperwork for H-1's, H-1B1's, E-3's, O-1's, and TN's. Ericsson also does not hire F-1's working on CPT or EAD for this position. Note: Due to the requirements of the National Security Agreement (CFIUS), only U.S. Citizens are eligible for this position. ## About this opportunity This is a remote position involving close collaboration with a small, specialized technical team supporting the CFIUS data center in Somerset, New Jersey, which services OSS Classic (fTelcordia) products. 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. ## What you will do * 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. ## The skills you bring You must have: * 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 Why join Ericsson? At Ericsson, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build solutions never seen before to some of the world’s toughest problems. You´ll be challenged, but you won’t be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next. What happens once you apply? Click Here to find all you need to know about what our typical hiring process looks like. Ericsson uses a merit-based hiring approach that values people with different experiences, perspectives and skillsets. We truly believe this approach drives innovation, which is essential for our future growth. We encourage people from all backgrounds to apply and realize their full potential as part of our Ericsson team. Ericsson is proud to be an Equal Opportunity employer, learn more. If you need assistance...