IBM z/OS mainframe Software Specialist
Role details
Job location
Tech stack
Job description
Provide deep technical expertise across the IBM z/OS mainframe ecosystem, supporting legacy MMIS assessment, reverse engineering, and modernization initiatives. This role focuses on analyzing and stabilizing COBOL-based, DB2/IMS-backed, batch-driven systems, and enabling their transition to a modern, modular MES architecture., * Analyze end-to-end mainframe application landscape, including COBOL programs (online and batch) DB2, IMS databases.VSAM/GSAM file structures
- Understand system flows across claims processing, Financial transactions Interfaces and batch cycles
- Perform code and job flow walkthroughs to document current-state architecture
Reverse Engineering & Documentation
- Extract and document Business rules and processing logic,Claims edits, pricing, and adjudication workflows.Data models and file structures (DB2 tables, VSAM datasets)
- Create Functional specifications ,Data flow diagrams ,Interface and dependency mappings
Mainframe Development & Operations
- Develop, maintain, and troubleshoot COBOL programs (batch and online) JCL scripts for job execution and scheduling.
- Work extensively with DB2 (SQL, stored procedures, performance tuning)
- IMS DB/DC (transactions, hierarchical databases)
- VSAM/GSAM (file handling and access methods)
- Utilize tools such as TSO/ISPF, SDSF, File Manager, Debugger
Modernization Support
- Support transformation initiatives by Identifying candidates for refactor, replatform, or rewrite
- Mapping legacy logic to modern services and APIs
- Assist in Data migration (DB2/VSAM * cloud databases)
- Batch-to-real-time processing transition
- Collaborate with architects on Strangler Fig implementation
Integration & Interfaces
- Analyze and support integrations using IBM MQ Series ,SFTP / batch file transfers
External interfaces and EDI pipelines
- Document upstream/downstream dependencies across MES modules
Requirements
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Minimum 10+ years of experience in IBM z/OS mainframe environments
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Experience with:
o COBOL (batch and online)
o JCL (job control, scheduling, troubleshooting)
o DB2 (SQL, schema design, performance tuning)
o VSAM/GSAM file systems
o IMS DB/DC (preferred)
- Experience with:
o TSO/ISPF, SDSF, and standard mainframe utilities
- Experience in large-scale transaction processing systems (preferably MMIS or financial systems)
Preferred Qualifications:
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Experience with Medicaid/MMIS or healthcare claims systems
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Exposure to mainframe modernization tools and strategies
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Familiarity with:
o API enablement of legacy systems
o Data migration to cloud platforms
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Understanding of CMS SMC or regulatory environments (nice to have)
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Project lead experience
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Strong analytical and reverse engineering capabilities
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Ability to interpret complex batch workflows and dependencies
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Collaboration with architects, SMEs, and modernization teams
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Clear documentation and communication skills
Bachelors in computer science or related field
Benefits & conditions
Where required by law, NTT DATA provides a reasonable range of compensation for specific roles. The starting pay range for this role is $77,120- $145,240. Actual compensation will depend on a number of factors, including the candidate's relevant experience, technical skills, and other qualifications. This position may also be eligible for incentive compensation based on individual and/or company performance. This position is eligible for company benefits including medical, dental, and vision insurance with an employer contribution, flexible spending or health savings account, life and AD&D insurance, short and long term disability coverage, paid time off, employee assistance, participation in a 401k program with company match, and additional voluntary or legally-required benefits.