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# Hiring: Mainframe Test Engineer || Omaha, NE (Onsite)

- **Company:** Key2Source INC
- **Location:** Omaha, NE, United States
- **Experience:** Expert
- **Salary:** $69,550.0 - $125,725.0
- **Contract:** Permanent contract
- **Skills:** JIRA, Automation of Tests, Batch Processing, Customer Information Control System (CICS), COBOL (Programming Language), Code Coverage, IBM DB2, DevOps, Job Control Language (JCL), Mainframes, Online Transaction Processing, Scrum Methodology, Systems Development Life Cycle, E2e Testing, SQL Databases, Test Case, Test Data, Virtual Storage Access Methods, Z/OS, Tricentis Tosca, C4ISR, Hp Alm, Bug Reporting, Information Technology, Servicenow
- **Published:** July 11, 2026
- **Apply:** https://www.careerjet.com/jobad/us95f85a5351a6fb58640e34273a2654c8

## About the Role

We are seeking a detail-oriented Mainframe Tester to join our Quality Assurance team. You will design, develop, and execute automated and manual test cases for mainframe-based applications, ensuring reliability, performance, and compliance with business requirements., 5+ years of experience in mainframe testing (COBOL, CICS, JCL, DB2, VSAM).
2+ years of hands-on experience with Tricentis Tosca, including module creation, test case design, and execution.
Strong understanding of mainframe architecture, batch processing, and online transaction systems.
Proficiency in writing and executing SQL queries for test validation.
Experience with defect tracking and test management tools (Jira, HP ALM, qTest, etc.).
Familiarity with SDLC and Agile/Scrum methodologies.
Excellent analytical, problem-solving, and communication skills., Bachelor's degree in Computer Science, Information Technology, or a related field (or equivalent experience).

## Description

Design, develop, and maintain automated test scripts for mainframe (CICS, IMS, batch) and integrated applications.
Execute functional, regression, integration, and end-to-end testing on mainframe systems (z/OS, DB2, COBOL, JCL).
Analyze requirements and technical specifications to create comprehensive test plans, test cases, and traceability matrices.
Collaborate with developers, business analysts, and stakeholders to identify defects and ensure timely resolution.
Validate batch jobs, file transfers, and database updates; verify JCL execution and ABEND handling.
Maintain test data, environments, and documentation in accordance with QA standards.
Report defects using tools such as Jira, ALM, or ServiceNow; track issues through resolution.
Participate in Agile/Scrum ceremonies, contributing to sprint planning and retrospectives.
Continuously improve test coverage, automation efficiency, and testing processes., Description The Defense Sector at Leidos has a current job opportunity for a DevOps Engineer supporting the C4ISR Solutions Operation. The DevOps Engineer will guide the definiti…

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