IBM z/OS mainframe Software Specialist

Req ID: 371888 

NTT DATA strives to hire exceptional, innovative and passionate individuals who want to grow with us. If you want to be part of an inclusive, adaptable, and forward-thinking organization, apply now.

We are currently seeking a IBM z/OS mainframe Software Specialist to join our team in Plano, Texas (US-TX), United States (US).

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.

Day to Day Job Duties:

Legacy System Analysis

• 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

 

Basic Qualifications:

•              Minimum 10+ years of experience in IBM z/OS mainframe environments

•              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:

•              Experience with Medicaid/MMIS or healthcare claims systems

•              Exposure to mainframe modernization tools and strategies

•              Familiarity with:

o   API enablement of legacy systems

o  Data migration to cloud platforms

•              Understanding of CMS SMC or regulatory environments (nice to have)

•              Project lead experience

•  Strong analytical and reverse engineering capabilities

•   Ability to interpret complex batch workflows and dependencies

•  Collaboration with architects, SMEs, and modernization teams

•   Clear documentation and communication skills

Bachelors in computer science or related field

 

 

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-r