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Senior Mainframe Developer Jobs in Ohio (NOW HIRING)

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 ...

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 ...

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 ...

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 ...

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 Developer information

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How much do senior mainframe developer jobs pay per hour?

As of Jul 5, 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.
What are the most commonly searched types of Mainframe Developer jobs in Ohio? The most popular types of Mainframe Developer jobs in Ohio are:
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What job categories do people searching Senior Mainframe Developer jobs in Ohio look for? The top searched job categories for Senior Mainframe Developer jobs in Ohio are:
What cities in Ohio are hiring for Senior Mainframe Developer jobs? Cities in Ohio with the most Senior Mainframe Developer job openings:
What are popular job titles related to Senior Mainframe Developer jobs in OH? For Senior Mainframe Developer jobs in OH, the most frequently searched job titles are:
Senior Mainframe Developer jobs near you
Infographic showing various Senior Mainframe Developer job openings in Ohio as of June 2026, with employment types broken down into 66% Full Time, 28% Part Time, 3% Temporary, and 3% Contract. Highlights an 83% Physical, 6% Hybrid, and 11% Remote job distribution, with an average salary of $114,004 per year, or $54.8 per hour.
Senior Mainframe Developer (zOS)

Senior Mainframe Developer (zOS)

ITTConnect

Columbus, OH • On-site

Full-time

Posted 19 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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