Senior Mainframe Systems Programmer – ISV z/OS

Ensono

Senior Mainframe Systems Programmer managing ISV products on IBM z/OS platform. Focused on installation, maintenance, and migration of third-party ISV solutions.

Posted 6/26/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $85,000 - $148,000 per yearWebsite

About the role

Key responsibilities & impact

Install, configure, maintain, and upgrade third-party ISV software products in a z/OS environment.
Lead initiatives to replace mainframe products with alternative vendor solutions.
Perform product evaluations, proof-of-concepts, and technical comparisons of replacement tools.
Plan and execute product migration and conversion activities, including configuration changes, data conversions, and operational cutovers.
Maintain and manage software using SMP/E, including RECEIVE, APPLY, ACCEPT, USERMODs, and maintenance management.
Troubleshoot and resolve issues related to ISV software installations, integrations, and runtime problems.
Work with application teams, operations, and vendors to diagnose system or product issues.
Develop and maintain installation documentation, procedures, and migration runbooks.
Assist in capacity planning, performance tuning, and operational support for ISV tools.
Support incident resolution and participate in root cause analysis for production issues involving ISV software.
Evaluate compatibility and impact of new z/OS releases on installed ISV products.

Requirements

What you’ll need

Extensive experience as a z/OS Systems Programmer supporting enterprise mainframe environments.
Strong background in installation and maintenance of ISV mainframe software products.
Hands-on experience with SMP/E software installation and maintenance processes.
Experience performing product migrations or conversions between competing vendor tools.
Strong troubleshooting and diagnostic skills across the z/OS platform.
Experience with IBM utilities and system tools commonly used in z/OS environments.
High-level working knowledge of TSO/ISPF environments and utilities.
Experience supporting multi-vendor ISV ecosystems in production mainframe environments.
Ability to analyze system documentation, vendor materials, and product architectures.

Benefits

Comp & perks

Unlimited Paid Days Off
Three health plan options
401k with company match
Eligibility for dental, vision, short and long-term disability, life and AD&D coverage, and flexible spending accounts
Family Forming Benefit including fertility coverage and adoption/surrogacy reimbursement
Paid childbearing and paternal leave
Education Reimbursement, Student Loan Assistance or 529 College Funding
Sabbatical leave
Wellness program
Flexible work schedule

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

z/OSSMP/EISV software installationproduct migrationtroubleshootingdiagnostic skillsIBM utilitiesTSOISPFcapacity planning

Soft Skills

leadershipproblem-solvingcommunicationcollaborationanalytical skills