Remote Senior Mainframe Engineer z/OS & Automation Leader

First National Bank of Omaha; Mississippi; Remote; USD 120,000 - 170,000; Full time

Benefits offered by this job

Medical Insurance

401k with Matching Contributions

Time Off Programs

Health Savings Account (HSA)

Employee Banking

Growth Opportunities

Tuition Assistance

Disability Insurance

Job summary

First National Bank of Omaha seeks an experienced Senior Mainframe Engineer to lead and modernize z/OS environments within our managed services team. You will drive standards, optimize processes, and ensure reliable mainframe delivery across customer environments.

Responsibilities include guiding upgrades, designing repeatable maintenance, improving performance, and mentoring staff. Strong SME leadership and governance are essential; occasional after-hours support may be required.

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 deployment

Software installation

JES2 / HCD / IODF

WLM / OMVS / USS

TSO / RACF

VTAM / TCP/IP

LPAR / HMC

SMS / HSM / DFDSS / VSAM

CICS / IMS / DB2 / IBM MQ

Tools

IBM MQ

Job description

First National Bank of Omaha seeks an experienced Senior Mainframe Engineer to lead and modernize z/OS environments within our managed services team. You will drive standards, optimize processes, and ensure reliable mainframe delivery across customer environments.

Responsibilities include guiding upgrades, designing repeatable maintenance, improving performance, and mentoring staff. Strong SME leadership and governance are essential; occasional after-hours support may be required.