Senior Mainframe Modernization SME (COBOL Expert)

Sansar Tec LLCChicago, IL, US

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Job Title : Senior Mainframe Modernization SME (COBOL Expert)

Location : Remote

We are seeking a Senior Mainframe Modernization Subject Matter Expert (SME) with deep expertise in COBOL and mainframe technologies to support the modernization of legacy mainframe applications. This role requires a strong technical background in mainframe systems, COBOL program analysis, and large-scale application modernization , along with experience in validating converted specifications and programs.

The ideal candidate will possess extensive experience in mainframe-to-modern technology transitions , with the ability to deep dive into COBOL applications, assess migration feasibility, and work closely with modernization teams to ensure accuracy and scalability. While knowledge of Java or .NET is a plus, this role primarily focuses on analyzing, understanding, and validating legacy COBOL applications during the modernization process.

Key Responsibilities :

Serve as a Subject Matter Expert (SME) on COBOL and mainframe systems , providing deep technical validation for application modernization efforts.
Analyze, assess, and document existing COBOL applications , data structures, and business logic to support modernization.
Work closely with business analysts, architects, and modernization teams to validate converted specifications and ensure functional accuracy .
Evaluate and recommend AI-driven analysis tools and other modernization solutions to optimize the conversion process.
Address complex mainframe-related queries from stakeholders and provide expert guidance on large-scale migration strategies.
Collaborate with Java / .NET development teams to bridge the gap between legacy and modern applications .
Participate in deep-dive discussions on modernization strategies , including performance optimization, scalability, and maintainability.
Validate and optimize migration methodologies from COBOL to modern platforms (Java, .NET, or cloud-based solutions) .
Ensure that the modernization approach aligns with industry best practices and business needs.

Required Skills & Qualifications :

10+ years of experience in mainframe development and modernization , with deep expertise in COBOL, JCL, CICS, VSAM, and DB2 .

Strong knowledge of mainframe application architecture and modernization strategies .

Experience validating converted mainframe applications to ensure accuracy and performance.

Familiarity with AI-driven program analysis tools for mainframe-to-modern platform transitions.

Ability to analyze and document complex legacy systems and business processes.

Strong problem-solving skills and experience handling difficult mainframe-related technical queries .

Experience working in multiple domains (Financial Services, Logistics, Healthcare, Insurance, etc.) .

Knowledge of healthcare policies and financial services regulations is a plus.

Excellent communication and stakeholder engagement skills to work with clients, architects, and development teams .

Experience with cloud-based modernization approaches (AWS, Azure, GCP) is a plus.

Knowledge of Java or .NET is beneficial but not mandatory for this role.

Why Join Us?

Work on cutting-edge mainframe modernization projects with a team of experts.

Competitive compensation and benefits package.

Fully remote role with flexible work arrangements.

Opportunity to work across multiple industries , including Financial Services, Healthcare, and Logistics .

Be a key part of legacy-to-modern transformation at scale.

If you are a COBOL expert with deep mainframe knowledge and a passion for modernizing legacy applications , we encourage you to apply and be part of our transformation team!