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Senior Mainframe Programmer 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 ...

Accenture

Mainframe Specialist

Columbus, OH

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Accenture

Mainframe Specialist

Cleveland, OH

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Accenture

Mainframe Specialist

Hartford, OH

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

Accenture

Mainframe Specialist

Cincinnati, OH

$70K - $196K/yr

Partner with cross-functional teams-architects, developers, QA, and business analysts-to gather ... Collaborate with senior leadership to secure executive sponsorship and organizational buy-in for ...

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 ...

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Senior Mainframe Programmer information

What is the difference between Senior Mainframe Programmer vs Mainframe Developer?

AspectSenior Mainframe ProgrammerMainframe Developer
CredentialsTypically requires a mainframe programming certification and several years of experienceOften requires similar certifications and experience, focusing on coding and development
Work EnvironmentWorks primarily on legacy mainframe systems within financial, insurance, or government sectorsDevelops and maintains mainframe applications, often in similar industries
Employer & Industry UsageCommonly employed by large corporations with mainframe infrastructureUsed interchangeably with mainframe programmer, focusing on application development

The main difference between a Senior Mainframe Programmer and a Mainframe Developer is primarily experience level and scope. Senior Mainframe Programmers often have more responsibilities, including overseeing projects and mentoring junior staff, while Mainframe Developers focus on coding and application creation. Both roles require similar credentials and are vital in industries relying on legacy mainframe systems.

What are the most commonly searched types of Mainframe Programmer jobs in Ohio? The most popular types of Mainframe Programmer jobs in Ohio are:
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Senior Mainframe Programmer jobs near you
Infographic showing various Senior Mainframe Programmer job openings in Ohio as of July 2026, with employment types broken down into 2% Locum Tenens, 82% Full Time, 7% Part Time, 7% Contract, and 2% Summer. Highlights an 83% Physical, 4% Hybrid, and 13% Remote job distribution.
Senior Mainframe Developer (zOS)

Senior Mainframe Developer (zOS)

ITTConnect

Columbus, OH • On-site

Full-time

Re-posted 3 days ago

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: Own and support a core mainframe application (MACSS) across production, enhancements, and project initiatives Develop and maintain applications using COBOL, JCL, DB2, and CICS Troubleshoot and resolve production issues across batch and online systems Collaborate with API and platform teams to enable integration via z/OS Connect services Support data flows and service exposure to downstream platforms (APIM, Kafka, etc.) Participate in system design discussions to support modernization and integration efforts Ensure performance, 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 Strong expertise in: COBOL JCL DB2 CICS Proven experience supporting production systems and critical applications Experience working in large enterprise environments (preferably utilities, banking, or insurance) Strong debugging and problem-solving skills in complex legacy environments Preferred Qualifications: Utilities industry experience. Experience with IBM z/OS Connect Exposure to API enablement of mainframe systems Familiarity with event-driven architectures (Kafka or similar) Experience supporting systems undergoing modernization or digital transformation.

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