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Mainframe Tester Jobs in Milwaukee, WI (NOW HIRING)

Cobol / Mainframe Developer

Milwaukee, WI · On-site

$48.25 - $62/hr

They are seeking a Cobol / Mainframe Developer to work within Card Management Systems, focusing on ... • Strong unit testing skills. • Flexibility to be on on-call support, as required. • ...

Mainframe Sr Developer

Milwaukee, WI · On-site

$90 - $120/hr

Mainframe Sr Developer Job ID: 2024-13158 Job Location: Milwaukee, WI or Lincoln, NE (100% Onsite ... Knowledgeable in test driven development (TDD) and automated functional testing including tools ...

They are seeking a Mainframe PL/1 Consultant with extensive experience in mainframe technologies ... Testing methods and tools, Knowledge of Build, Knowledge of Maintenance and Support methods • At ...

... Testing methods and tools, Knowledge of Build, Knowledge of Maintenance and Support methods At ... At least 4 years of experience with Mainframe techonologies Additional Information ** U.S. citizens ...

... Testing methods and tools, Knowledge of Build, Knowledge of Maintenance and Support methods At ... At least 4 years of experience with Mainframe techonologies Additional Information ** U.S. citizens ...

... Testing methods and tools, Knowledge of Build, Knowledge of Maintenance and Support methods At ... At least 4 years of experience with Mainframe techonologies Additional Information ** U.S. citizens ...

Jenkins * 2 yrs of SDET knowledge in PL1 (Mainframe) * 2 yrs of Insurance knowledge * Framework Design and Enhancement * Experience with Insurance domain * Ability to work in team environment and ...

Jenkins * 2 yrs of SDET knowledge in PL1 (Mainframe) * 2 yrs of Insurance knowledge * Framework Design and Enhancement * Experience with Insurance domain * Ability to work in team environment and ...

Participate in Disaster Recovery (DR) planning, testing, and recovery exercises to ensure business continuity and platform resiliency. * Manage and support mainframe hardware, coupling facilities ...

... mainframe systems, on-prem and cloud environments. Detect, diagnose, and resolve performance ... Conduct functional, automated and regression testing during different phases of software ...

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Mainframe Tester information

See Milwaukee, WI salary details

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How much do mainframe tester jobs pay per hour?

As of Aug 26, 2026, the average hourly pay for mainframe tester in Milwaukee, WI is $42.92, according to ZipRecruiter salary data. Most workers in this role earn between $32.98 and $51.68 per hour, depending on experience, location, and employer.

What is a mainframe tester?

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.

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.

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 job categories do people searching Mainframe Tester jobs in Milwaukee, WI look for?

The top searched job categories for Mainframe Tester jobs in Milwaukee, WI are:

Infographic showing various Mainframe Tester job openings in Milwaukee, WI as of August 2026, with employment types broken down into 75% Full Time, 18% Part Time, and 7% Contract. Highlights an 65% Physical, 2% Hybrid, and 33% Remote job distribution, with an average salary of $89,155 per year, or $42.9 per hour.

Cobol / Mainframe Developer

Milwaukee, WI • On-site

Ampcus Inc
IT Services • 1 - 5K employees

$48.25 - $62/hr

Full-time

Re-posted 9 days ago


Job description

Job Summary:
Ampcus Inc. is a certified global provider of a broad range of Technology and Business consulting services. They are seeking a Cobol / Mainframe Developer to work within Card Management Systems, focusing on backend business logic and coding experience. The role requires strong expertise in Cobol programming and Mainframe environments, along with experience in payment transactions.
Responsibilities:
• Must need to have an experience with Mainframe.
• Need a strong experience with Cobol Programming and JCL.
• Will be responsible for handling backend business logics.
• Experience with Payment Transactions or Debit Transactions area would be nice to have.
• Must need to have hands-on coding experience.
• Previous Client experience is a great to have.
Qualifications:
Required:
• Bachelor's degree in Computer Science, Information Technology or equivalent experience.
• 8 years of software development engineering experience.
• Working knowledge in Linux, UNIX & z/OS operating systems.
• Proficient with Mainframe Development as well as modern Object-Oriented development.
• Need to be able to develop in both a legacy Mainframe TSO environment and also a modern server/container environment using common IDE’s and development tools.
• Knowledge and experience in transformation/modernization of processing high volumes of data via Mainframe processing to scalable On-prem Distributed or Cloud processing via microservices and containers.
• Knowledge of the following: File Transmission (FTP/NDM) & batch processing in very high-volume settings is required.
• Experience in technical design writing and documentation.
• Work independently and collaborate in team design sessions.
• Strong unit testing skills.
• Flexibility to be on on-call support, as required.
• Excellent written and verbal communication skills.
• Experience in Financial Services industry.
Preferred:
• Experience with Payment Transactions or Debit Transactions area would be nice to have.
• Previous Client experience is a great to have.
• Knowledge of event driven architecture and common event processing models and platforms is desired.
• Experience in decomposing and rewriting legacy processes and systems into more modern infrastructures a plus.
• Familiarity in microservice architectures and containers (Kubernetes/K8s, OpenShift, Docker) a plus.
• Familiarity in processing in a cloud (Azure, AWS) environment a plus.
• Familiarity in Domain Driven Design a plus.
Company:
Ampcus is a global business, technology consulting and an staff augmentation firm specializing in AI/ML,digital solutions, Cybersecurity & Risk management, Testing, Forensics & Fraud services and human capital management. Founded in 2004, the company is headquartered in Chantilly, USA, with a team of 1001-5000 employees. The company is currently Late Stage.

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About Ampcus

Sourced by ZipRecruiter

Ampcus Inc. is a ISO 20000, ISO 27000, ISO 9001, CMMI DEV/3 SM and CMMI SVC/3 SM certified global provider of a broad range of Technology and Business consulting services. From strategy to execution, our disciplined yet flexible approach starts and ends with our clients. By listening hard and working harder, client goals become our goals. Their success is our satisfaction. It’s why our clients sleep well at night. We believe that the success of an engagement is determined by strong project management, as well as clear communication and mutual commitment working collaboratively. Our methodology begins with listening to the customer about their needs, then working with their team to gain a clear understanding of the requirements, while providing knowledge transfer of best practices for the organization.

Industry

It services

Company size

1,001 - 5,000 Employees

Headquarters location

Chantilly, VA, US

Year founded

2004