IBM z/OS mainframe Software Specialist

IBM z/OS Mainframe Software Specialist NTT DATA Services is currently seeking an 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 Reverse Engineering & Documentation Mainframe Development & Operations Modernization Support Integration & Interfaces Basic Qualifications: Minimum 10+ years of experience in IBM z/OS mainframe environments Experience with: COBOL (batch and online), JCL (job control, scheduling, troubleshooting), DB2 (SQL, schema design, performance tuning), VSAM/GSAM file systems, IMS DB/DC (preferred) Experience with: 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: API enablement of legacy systems, 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. Sierra Systems, An Ntt Data Company