Mainframe Developer / Tester

Role : Mainframe Developer / Tester

Location : Columbus, OH (Hybrid)- 3days office

Job Description :

Mainframe Developer / Tester role (primarily development with some testing experience). This will be a hybrid position based in Columbus, OH.

Key Responsibilities

Design, develop, enhance, and maintain COBOL applications running on IBM Mainframe platforms.

• Develop and support online and batch applications using CICS , JCL , and VSAM .
• Create, modify, and optimize batch jobs using JCL , SORT , and utilities.
• Work with VSAM datasets and flat files, including file layouts, access methods, and performance tuning.
• Use SCLM for source control, versioning, and promotion across environments.
• Interact with schedulers (CA7) to design, troubleshoot, and optimize batch job flows.
• Support file processing and analysis using tools such as File Manager .
• Perform impact analysis , root cause analysis, and production support for mainframe applications.
• Collaborate with architects, business analysts, and upstream / downstream teams to deliver high-quality solutions.
• Follow enterprise coding standards, documentation practices, and change management processes.
• Perform unit testing, system testing, and integration testing for mainframe applications.
• Develop and execute test cases for COBOL, CICS, and batch programs.
• Validate data integrity across files, VSAM datasets, and interfaces.
• Identify, analyze, and resolve defects; work closely with QA and business teams for issue resolution.
• Support production validation, regression testing , and post-implementation verification.

Required Skills & Experience

Technical Skills

Experience