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Mainframe Tester Jobs in Ohio (NOW HIRING)

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 ... Develop automated testing, CI/CD pipelines, and deployment processes for cloud environments.

BC Forward

Project Tester (1102)

Brooklyn, OH · On-site

$30/hr

Project Tester (1102) Location: Brooklyn, OH 44144 (Onsite, 5 days/week) - 4910 Tiedeman Rd ... Perform business analysis for payment and deposit applications across mainframe, PC, distributed ...

SVATS

Assembler and COBOL- CICS Developer

Columbus, OH · On-site

$47 - $63.50/hr

... Mainframe technologies. A typical day involves collaborating with team members to understand ... Perform code walkthroughs and support system testing. * Assist in the documentation of application ...

Maverick Direct Inc.

COBOL IDMS/ADSO

Cleveland, OH

$48.75 - $66/hr

This is heavy design, development and testing work. Qualifications Required skills The successful candidate needs at least 5-8 years of mainframe COBOL, IDMS/ADSO computer programming, systems design ...

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Mainframe Tester information

See Ohio salary details

$18

$41

$66

How much do mainframe tester jobs pay per hour?

As of Jul 19, 2026, the average hourly pay for mainframe tester in Ohio is $41.36, according to ZipRecruiter salary data. Most workers in this role earn between $31.78 and $49.81 per hour, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive in the Mainframe Tester position, and why are they important?

A Mainframe Tester needs strong analytical abilities, proficiency in mainframe environments (such as IBM z/OS), and knowledge of programming languages like COBOL, JCL, and SQL, often supported by a degree in computer science or a related field. Experience with test automation tools (e.g., IBM Rational, CA tools), debugging utilities, and relevant certifications like ISTQB can be highly beneficial. Excellent problem-solving skills, attention to detail, teamwork, and effective communication help testers excel in cross-functional teams. These skills and qualities are crucial for ensuring reliability, compliance, and performance of mission-critical mainframe systems in large organizations.

What are the typical responsibilities and daily tasks of a Mainframe Tester?

Mainframe Testers are primarily responsible for designing, developing, and executing test cases on mainframe applications to ensure their accuracy and performance. On a daily basis, you might review requirements, create test data, identify defects, and work closely with developers to resolve coding issues. The role often involves collaborating with business analysts and system architects to understand the application's functionality and ensure compliance with business and technical standards. Mainframe Testers frequently use specialized testing tools and may participate in both manual and automated testing cycles. This collaborative and detail-oriented environment helps ensure high-quality and reliable mainframe systems for the organization.

Is mainframe testing difficult?

Mainframe testing can be complex due to the legacy systems, specialized tools, and programming languages involved. It requires attention to detail, understanding of mainframe environments, and often knowledge of testing automation and scripting. While challenging, proper training and experience can make it manageable for testers.

What is a Mainframe Tester job?

A Mainframe Tester is responsible for testing applications running on mainframe systems to ensure their functionality, reliability, and security. They create and execute test cases, validate data processing, and identify defects in mainframe applications. They work with technologies like COBOL, JCL, DB2, and CICS to test batch and online processes. Their role is critical in industries like banking, insurance, and healthcare, where mainframes handle large-scale transaction processing. The tester collaborates with developers and business analysts to ensure the applications meet business requirements.

Can mainframe be replaced by AI?

Mainframe testers work with legacy systems that often require specialized knowledge of mainframe environments, programming languages, and testing tools. While AI can assist in automating certain testing tasks and improving efficiency, it is unlikely to fully replace mainframe testers due to the complexity and critical nature of mainframe systems. Human expertise remains essential for designing tests, interpreting results, and managing system-specific issues.

Is mainframe in demand?

Mainframe testing remains in demand due to the continued use of legacy systems in industries like finance and government. Skilled testers with knowledge of mainframe environments, COBOL, and testing tools are sought after to ensure system reliability and security.

How to be a mainframe tester?

To become a mainframe tester, you should have a strong understanding of mainframe environments, including COBOL, JCL, and DB2, along with experience in software testing and quality assurance. Gaining certifications such as IBM Certified Mainframe Application Developer can enhance your credentials, and familiarity with testing tools like CA Test Data Manager or IBM Rational Test Workbench is beneficial. Developing skills in scripting, debugging, and working within mainframe operating systems is essential for success in this role.
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Mainframe Tester jobs near you
Infographic showing various Mainframe Tester job openings in Ohio as of July 2026, with employment types broken down into 43% Full Time, and 57% Contract. Highlights an 92% In-person, 4% Hybrid, and 4% Remote job distribution, with an average salary of $86,029 per year, or $41.4 per hour.
Mainframe Modernization Engineer (COBOL)

Mainframe Modernization Engineer (COBOL)

Computer Task Group, Inc

Columbus, OH • On-site

$45 - $50/hr

Contractor

Posted 23 days ago

Job description

CTG is seeking an experienced Mainframe Modernization Engineer (COBOL) to support a large-scale legacy modernization initiative. This role combines deep expertise in COBOL, CICS, and DB2 with modern Java development to migrate mission-critical applications to scalable microservices architectures.
Location: Columbus, OH
Duration: 12 months
Key Responsibilities:
  • Develop, maintain, and migrate COBOL/CICS/DB2 online and batch applications.
  • Design and build Java 21/Spring Boot microservices.
  • Support application modernization, testing, deployment, and production support.
  • Develop containerized solutions using Docker and Kubernetes.
  • Implement Kafka-based messaging solutions.
  • Optimize SQL performance and participate in Agile development activities.

Required Qualifications:
  • 7+ years of backend or full-stack development experience.
  • Strong hands-on experience with COBOL, CICS, DB2, and mainframe migration.
  • Expert knowledge of Java 17+/21 and Spring Boot.
  • Experience with microservices, Docker, Kubernetes, Kafka, Git, and CI/CD.
  • Strong SQL, troubleshooting, and enterprise application architecture skills.

Education:
  • Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field.
  • Equivalent combination of education and relevant professional experience may be considered.

Excellent verbal and written English communication skills and the ability to interact professionally with a diverse group are required.
CTG does not accept unsolicited resumes from headhunters, recruitment agencies, or fee based recruitment services for this role.
To Apply:
To be considered, please apply directly to this requisition using the link provided. Kindly forward this to any other interested parties. Thank you!
The expected base salary for this position ranges from $45.00 to $50.00/hour. Salary offers are based on a wide range of factors including relevant skills, training, experience, education, market factors, and where applicable, licensure or certifications obtained. In addition to salary, a competitive benefit package is also offered.
About CTG
CTG, a Cegeka company, delivers IT and business solutions that enhance clients' digital agility, empowering them to seize new opportunities and overcome any challenge. Backed by more than 60 years' experience and a commitment to being a reliable, results-driven partner, we work shoulder to shoulder with clients to shape digital together. Our vision is to be an indispensable partner to our clients and the preferred career destination for digital and technology experts. With more than 9,000 team members in over 15 countries, we combine global expertise with local insight to deliver innovative solutions. We operate across the Americas, Europe, and India, working with over 3,000 clients in many of today's highest-growth industries.
Together, we shape what's next-working shoulder to shoulder to deliver impactful solutions for our clients and society. Our culture is built by the people who work at CTG, the values we hold, and the actions we take. It's a living, breathing thing that is renewed every day through the ways we engage with each other, our clients, and our communities. At CTG, you'll find a workplace where you are encouraged to grow, supported in your ambitions, and empowered to shape your own career journey. For more information, visit www.ctg.com.
CTG will consider for employment all qualified applicants including those with criminal histories in a manner consistent with the requirements of all applicable local, state, and federal laws.
CTG is an Equal Opportunity Employer. CTG will assure equal opportunity and consideration to all applicants and employees in recruitment, selection, placement, training, benefits, compensation, promotion, transfer, and release of individuals without regard to race, creed, religion, color, national origin, sex, sexual orientation, gender identity and gender expression, age, disability, marital or veteran status, citizenship status, or any other discriminatory factors as required by law. CTG is fully committed to promoting employment opportunities for members of protected classes.
Computer Task Group logo

About Computer Task Group

Sourced by ZipRecruiter

We know that achieving our mission begins and ends with our people—and by people we mean you. Regardless of individual roles or responsibilities, regardless of industry or subject matter expertise, our lives happen in relation to other people—our colleagues, clients, and partners. CTG cultivates a workplace that attracts and develops the best people. Being Great Place to Work-CertifiedTM not only supports our Vision but also validates the rewarding workplace culture that has made CTG a leading IT and digital solutions and services company for more than 55 years.

Company size

1,001 - 5,000 Employees

Headquarters location

Buffalo, NY, US

Year founded

1966

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