Req ID: 371888

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 12 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-required benefits.

Whenever possible, we hire locally to NTT DATA offices or client sites. This ensures we can provide timely and effective support tailored to each client's needs. While many positions offer remote or hybrid work options, these arrangements are subject to change based on client requirements. For employees near an NTT DATA office or client site, in-office attendance may be required for meetings or events, depending on business needs. At NTT DATA, we are committed to staying flexible and meeting the evolving needs of both our clients and employees. NTT DATA recruiters will never ask for payment or banking information and will only use [redacted].com and [redacted].nttdataservices.com email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form, https://us.nttdata.com/en/contact-us.