Doran Jones Inc. · 1 hour ago
Mainframe Modernization Engineer
Dallas, TX
Full-time
Onsite
Senior Level
5+ years expDoran Jones Inc. is a part of the McLaren Strategic Ventures Group, specializing in technology consulting. They are seeking a Mainframe Modernization Engineer to support a legacy transformation initiative, focusing on modernizing COBOL-based systems into Java applications through deep analysis and collaboration with Java engineering teams.
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Responsibilities
Analyze and interpret legacy COBOL batch programs running on IBM mainframes, including programs utilizing JCL, DB2, and VSAM
Understand and document functional logic, control flow, and data transformations to support modernization efforts
Review and validate automatically generated functional documentation for accuracy, completeness, and alignment with actual program behavior
Design and execute test cases to validate business logic and ensure output consistency between legacy and modernized systems
Compare Java program outputs against original COBOL program results to identify discrepancies
Collaborate with modernization and Java development teams to resolve mismatches and refine generated code
Participate in transformation quality assurance activities and contribute to continuous improvement of the modernization platform
Qualification
Required
5–8 years of hands-on experience working with COBOL on IBM mainframe environments
Strong experience with JCL, DB2, and VSAM
Hands-on experience supporting and analyzing mainframe batch jobs
Proven ability to analyze complex COBOL logic and map it to equivalent behavior in modern applications
Solid understanding of testing methodologies, validation techniques, and defect analysis
Strong analytical skills and attention to detail when reconciling outputs across systems
Preferred
Experience participating directly in large-scale legacy modernization or platform transformation initiatives
Exposure to Java, including Java on mainframe environments such as z/OS
Prior experience participating in COBOL-to-Java transformations or legacy modernization initiatives
Experience working alongside platform or tooling teams supporting automated code transformation
Company
Doran Jones Inc.
Doran Jones Inc.
51-200 employees
H1B Sponsorship
Doran Jones Inc. has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
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Trends of Total Sponsorships
2025 (6)
2024 (12)
2023 (8)
2022 (5)
2021 (5)
2020 (13)
Funding
Current Stage
Growth StageTotal Funding
unknown2021-07-14Acquired
Leadership Team
Matt Doran
Co-Founder & Head of Sales
Recent News
Built In NYC
2024-04-07
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