Senior Mainframe Systems Administrator

Western & Southern Financial Group; Cincinnati (OH); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

Medical, dental, vision, and life保险

401(k) savings plan with pension

Paid time off with tenure-based accrue

Tuition reimbursement

Parental leave

On-site fitness center & cafeteria

Employee discount program

Job summary

Western & Southern Financial Group is seeking a Senior Mainframe Systems Administrator to manage and maintain core z/OS and z/VM platforms supporting critical business applications.

You will oversee system performance, capacity, security administration and operational reliability, coordinating with internal IT teams on incident resolution and ensuring stable mainframe operations. This role suits someone who enjoys deep technical problem-solving.

Qualifications

• Senior-level Mainframe Systems Administration experience.
• Experience managing z/OS and z/VM environments in a financial setting.
• Strong skills in incident resolution, reliability engineering and capacity planning.

Responsibilities

• Monitor system health and performance, plan maintenance and upgrades.
• Coordinate with IT teams to resolve incidents and ensure high availability.
• Maintain secure, compliant mainframe operations in a financial services environment.

Skills

Mainframe administration

System monitoring

Capacity planning

Security administration

Tools

z/OS

z/VM

JCL

SDSF/ISPF

Job description

Join Western & Southern – Somewhere You Want to Be

Western & Southern is somewhere to grow, lead, win and do good for others. Our supportive culture, continuous learning opportunities and connection to our local communities make our company the ideal place for a career. For more than 137 years, our long-term success has been fueled by a deep commitment to customer service and our community.

Headquartered in Cincinnati, W&S is a Fortune 500® company recognized as one of America’s Best Midsize Employers by Forbes. Our commitment to career growth and employee development earned us a top 100 ranking on the American Opportunity Index (AOI). We are dedicated to creating opportunities for our associates to grow and succeed. We take pride in our award-winning talent development team and our recognition as a Top 10 Military Friendly Employer and Top Spouse Employer.

Our Culture: Excellence and Collaboration:

Western & Southern is built on a culture of integrity, top-notch performance, teamwork and collaboration. We’re committed to hiring and developing professionals who strive for excellence, demonstrate strong ethics and make fact‑based decisions. Our associates are empowered to chase their career dreams while being supported every step of the way.

A Day in the Life of a Senior Mainframe Systems Administrator:

As a Senior Mainframe Systems Administrator, you will manage and maintain core z/OS and z/VM platforms that support Western & Southern's critical business applications. You will oversee system performance, capacity, security administration, and operational reliability. Your day includes monitoring system health, implementing maintenance and upgrades, coordinating with internal IT teams on incident resolution, and ensuring stable and compliant mainframe operations. This role suits someone who enjoys deep technical problem‑solving, structured operational work, and maintaining high‑availability environments in a financial setting.

Key Tools & Technologies You’ll Work With:

• z/OS: Core operating system administration and maintenance.
• z/VM: Virtualization management for mainframe workloads.
• JCL: Job control for batch processing and operational workflows.
• Security administration and access management
• SDSF/ISPF: System monitoring, analysis, and command interfaces.
• Performance monitoring and capacity planning.
• Networking and storage utilities supporting mainframe operations.

Premier Benefits to Support You

We offer a comprehensive benefits package, including:

• Medical, dental, vision, and life insurance
• 401(k) savings plan with pension options.
• Paid time off increasing with tenure.
• Tuition reimbursement and individualized career development plans.
• Parental leave and maternity leave with a 4-week transition back to work.
• Access to on-site amenities like a fitness center, cafeteria and more.
• Extensive employee discount program.

Western & Southern is not just a place to work—it’s somewhere to grow, lead, win and make a difference in your career and community. Learn more at www.westernsouthern.com/careers/home-office-careers.