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Senior Mainframe Developer Jobs in Ohio (NOW HIRING)

ITTConnect

Senior Developer - IBM z/OS Connect

Columbus, OH · On-site

$52.75 - $69.50/hr

ITTConnect is seeking a Senior Mainframe Developer - IBM zOS Connect to work on site for a client in the Columbus, OH area. This is a contract position with a client that is a global leader in ...

ITTConnect

Senior Developer - IBM z/OS Connect

Columbus, OH · On-site

$52.75 - $69.50/hr

ITTConnect is seeking a Senior Mainframe Developer - IBM zOS Connect to work on site for a client in the Columbus, OH area. This is a contract position with a client that is a global leader in ...

PNC Bank

Software Engineer Sr

Strongsville, OH · Hybrid

$86K - $158K/yr

As a Software Engineer Sr within PNC's Technology organization, you will be based in Pittsburgh, PA ... Solving, Mainframe DevOps, Process Improvements, Release Management, Software Solutions, User ...

PNC Bank

Software Engineer Sr

Cleveland, OH · Hybrid

$86K - $158K/yr

As a Software Engineer Sr within PNC's Technology organization, you will be based in Pittsburgh, PA ... Solving, Mainframe DevOps, Process Improvements, Release Management, Software Solutions, User ...

Arcadia Talent Advisory LLC

$43.75 - $56.25/hr

NO 3RD PARTIES AT ALL- We are seeking a senior consultant with deep mainframe services and infrastructure modernization experience to lead a MainframetoMFaaS renewal and transformation initiative

Lorven Technologies

Senior Java Developer

Columbus, OH · On-site +1

$55.25 - $70.50/hr

We are looking for an experienced Senior Java Developer with strong expertise in mainframe migration and cloud modernization. This is Full Time & Remote role who can work In EST Time Zone Role ...

Mind Ware Inc

Senior Cobol Developer

Columbus, OH

Senior Cobol Developer Location: Alpharetta, GA (or) Lincoln, NE (or) Columbus, OH Job Type: 5 days ... Design, develop, and maintain mainframe-based application systems in alignment with business ...

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How much do senior mainframe developer jobs pay per hour?

As of Jun 15, 2026, the average hourly pay for senior mainframe developer in Ohio is $54.81, according to ZipRecruiter salary data. Most workers in this role earn between $51.44 and $59.86 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Senior Mainframe Developer, and why are they important?

To thrive as a Senior Mainframe Developer, you need deep expertise in mainframe programming languages (like COBOL, JCL, and PL/I), systems analysis, and a strong understanding of legacy application architectures, typically supported by a degree in computer science or related experience. Familiarity with tools such as IBM z/OS, DB2, CICS, and version control systems is essential, along with relevant certifications like IBM Certified System Programmer. Excellent problem-solving, communication, and leadership skills help you collaborate effectively and mentor junior developers. These skills are crucial for maintaining mission-critical systems, ensuring reliability, and guiding modernization efforts in complex enterprise environments.

What are some common challenges faced by Senior Mainframe Developers when integrating legacy systems with modern technologies?

Senior Mainframe Developers often encounter challenges when integrating legacy mainframe systems with newer technologies such as cloud platforms, APIs, or microservices. These challenges include ensuring data consistency, maintaining system security, and minimizing downtime during migrations. Collaboration with cross-functional teams, such as infrastructure engineers and application developers, is key to developing seamless integration solutions. Staying up-to-date with modernization tools and best practices can help address these complexities and support the organization's digital transformation goals.

What are Senior Mainframe Developers?

Senior Mainframe Developers are experienced professionals who design, develop, and maintain mainframe systems—large-scale computers used by organizations for critical applications, bulk data processing, and enterprise resource planning. They are proficient in languages like COBOL, JCL, and Assembler, and often work with databases and transaction processing systems. Their responsibilities include troubleshooting system issues, optimizing performance, mentoring junior developers, and ensuring the reliability and security of mainframe operations.
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Senior Mainframe Developer jobs near you
Senior Mainframe Developer (zOS)

Senior Mainframe Developer (zOS)

ITTConnect

Columbus, OH • On-site

Full-time

Posted 29 days ago

Job description

Job Description
ITTConnect is seeking a Senior Mainframe Developer (zOS Environment) to work on site for a client in the Columbus, OH area. This is a contract position with a client that is a global leader in consulting, digital transformation, technology and engineering services with over 300,000 team members in nearly 50 countries. The end client is in the Utilities sector.
Job location: Columbus, OH or Nashville, TN (both locations would be for on site work)
We are seeking a Senior Mainframe Developer to support a critical legacy platform (MACSS) as part of a large-scale modernization initiative tied to the adoption of the Gigawatt AI platform.
This role sits at the intersection of legacy system stability and modern platform enablement, where core mainframe applications are being API-enabled and integrated into an AI-driven utility platform. You will play a key role in ensuring that foundational systems are scalable, reliable, and ready to support real-time data access and service exposure.
Key Responsibilities:
  • Ownand support a core mainframe application (MACSS) across production,enhancements, and project initiatives
  • Developand maintain applications using COBOL, JCL, DB2, and CICS
  • Troubleshootand resolve production issues across batch and online systems
  • Collaboratewith API and platform teams to enable integration via z/OS Connectservices
  • Supportdata flows and service exposure to downstream platforms (APIM, Kafka,etc.)
  • Participatein system design discussions to support modernization and integrationefforts
  • Ensureperformance, reliability, and scalability of legacy systems

Why This Role Matters
This position is critical in enabling the organization's transition to a modern, API-driven architecture by ensuring the stability and scalability of its core legacy systems.
Requirements
  • 8+years of hands-on mainframe development experience
  • Strongexpertise in:
    • COBOL
    • JCL
    • DB2
    • CICS
  • Provenexperience supporting production systems and critical applications
  • Experienceworking in large enterprise environments (preferably utilities,banking, or insurance)
  • Strongdebugging and problem-solving skills in complex legacy environments

Preferred Qualifications:
  • Utilities industry experience.
  • Experiencewith IBM z/OS Connect
  • Exposureto API enablement of mainframe systems
  • Familiaritywith event-driven architectures (Kafka or similar)
  • Experiencesupporting systems undergoing modernization or digital transformation.

Apply