Senior Mainframe Engineer – Remote z/OS Modernization Lead

First National Bank of Omaha; Arkansas; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Medical, Dental, Vision Insurance

401k, With Matching Contributions

Time Off Programs

HSA/Dependent Care

Employee Banking

Growth Opportunities

Tuition Assistance

Disability Insurance

Job summary

First National Bank of Omaha is seeking a Senior Mainframe Engineer to lead z/OS upgrade projects, standardize mass maintenance, and drive operational excellence across client environments.

You will oversee IBM software installations, collaborate with cross-functional teams, and develop documentation. Remote work from anywhere in the U.S. is supported, with occasional on-site requirements.

Qualifications

• Proven experience in z/OS operating system upgrades, mass maintenance deployment, and software installation.
• In-depth knowledge of z/OS components: JES2, HCD/IODF, SMP/E, WLM, OMVS/USS, SMF/RMF, ASM, GRS, SDSF, TSO and RACF
• Strong understanding of communication protocols (VTAM, TCP/IP) and LPAR configuration via HMC
• Expertise in storage management (SMS, HSM, DFDSS, VSAM, IDCAMS, ICF Catalogs)
• Minimum 10 years of experience as a Mainframe Senior Systems Engineer

Responsibilities

• Serve as a technical leader, guiding best practices and mentoring team members on z/OS operating system upgrade optimization
• Design and implement standardized approaches for z/OS upgrades and mass maintenance to ensure repeatable, high-quality outcomes
• Lead efforts to optimize system performance, streamline processes, and reduce operational complexity
• Oversee installation, configuration, and maintenance of IBM and ISV software products, ensuring alignment with enterprise standards
• Collaborate with cross-functional teams to plan and execute operating system upgrades with minimal business impact
• Develop and maintain comprehensive technical documentation and templates for operating system rollouts
• Drive adoption of new technologies and capabilities (e.g., Sysplex enhancements, automation frameworks) to support strategic objectives
• Act as the subject matter expert (SME) for mainframe infrastructure projects, providing technical direction and governance
• Provide advanced troubleshooting and resolution for escalated incidents beyond Level 1 support
• Participate in after-hours and weekend support as required

Skills

z/OS upgrades

Mass maintenance

Software installation

z/OS components

VTAM & TCP/IP

LPAR/HMC

Storage management

10+ years experience

Tools

CICS TS

IMS

DB2

IBM MQ

SMS/HSM/DFDSS

Job description

First National Bank of Omaha is seeking a Senior Mainframe Engineer to lead z/OS upgrade projects, standardize mass maintenance, and drive operational excellence across client environments.

You will oversee IBM software installations, collaborate with cross-functional teams, and develop documentation. Remote work from anywhere in the U.S. is supported, with occasional on-site requirements.