Senior Mainframe Engineer: z/OS Upgrades & Automation Lead

First National Bank of Omaha is seeking a Senior Mainframe Engineer to lead standardization and optimization of z/OS upgrades within our managed services. This role focuses on developing repeatable processes, compliance with enterprise standards, and guiding teams on upgrading mainframe environments.

The ideal candidate will bring deep z/OS expertise, plus the ability to plan upgrades with minimal business impact and mentor staff. Remote work is supported with occasional travel as needed.