Remote Senior Mainframe Engineer: z/OS Upgrades

First National Bank of Omaha (FNBO) is seeking a Senior Mainframe Engineer to lead and optimize z/OS environments within our managed services team. You will guide upgrades, mass maintenance, and the deployment of IBM software across customer mainframe estates.

The role emphasizes technical leadership, standardized processes, and collaboration with cross-functional teams to achieve scalable, reliable mainframe delivery. Remote work is supported.