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Senior Mainframe Programmer Jobs in Ohio (NOW HIRING)

Apolis

Senior Mainframe Systems Programmer

Westlake, OH · On-site

$51 - $64.75/hr

Senior Mainframe Systems Programmer The Sr. Mainframe Systems programmer is responsible for the overall engineering, operations, and planning of the mainframe, IBM z/OS operating system software and ...

E-Solutions

Mainframe Developer

Cincinnati, OH · On-site

$47 - $60.50/hr

Role: Sr. Mainframe Developer with strong Assembler exp. Location: Cincinnati, OH Duration: Contract Need candidate who can work onsite from Day 1 (3-4 days onsite a week) * Having 10+ years of ...

ITTConnect

Senior Developer - IBM z/OS Connect

Columbus, OH · On-site

$51 - $67.25/hr

Senior Mainframe Developer - IBM zOS Connect 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 ...

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 ...

Teradata

Sr. Mainframe Application Developer

Columbus, OH · On-site

$45.75 - $58.75/hr

What You'll Do Teradata is looking for a skilled Mainframe Developer to join our Customer Developer Tools (CDT) organization. This role is critical in supporting and evolving our mainframe-based ...

Keylent Inc

Mainframe Developer

Cleveland, OH · On-site

$110K - $115K/yr

Mainframes JD (onsite Senior Developer-Green card Holder/Citizens) Total experience with 5+ years of experience in Mainframe development. Education required: Bachelor's or Master's degree in computer ...

United IT Solutions

Mainframe senior developer

Cincinnati, OH · On-site

$47 - $60.50/hr

* Minimum of 8-10 years of Strong experience in IBM Mainframes technologies: TSO, Cobol, SAS, JCL ... Exposure to DevOps tools such as Jenkins, Nexus, Ansible is a plus. This not a remote option and ...

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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.

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Senior Mainframe Programmer jobs near you
Senior Mainframe Developer (zOS)

Senior Mainframe Developer (zOS)

ITTConnect

Columbus, OH • On-site

Full-time

Posted 13 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:
  • 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