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IBM z/OS mainframe Software Specialist

NTT

Plano, Texas, United States Full-time June 19, 2026
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Vacancy Description

JOB DESCRIPTION

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

  • Ex...
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