IBM z/OS mainframe Software Specialist

Req ID:371888NTT 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 AnalysisAnalyze end-to-end mainframe application landscape, including COBOL programs (online and batch) DB2, IMS databases.VSAM/GSAM file structuresUnderstand system flows across claims processing, Financial transactions Interfaces and batch cyclesPerform code and job flow walkthroughs to document current-state architectureReverse Engineering & DocumentationExtract 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 mappingsMainframe Development & OperationsDevelop, 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, DebuggerModernization SupportSupport transformation initiatives by Identifying candidates for refactor, replatform, or rewriteMapping legacy logic to modern services and APIsAssist in Data migration (DB2/VSAM cloud databases)Batch-to-real-time processing transitionCollaborate with architects on Strangler Fig implementation Integration & InterfacesAnalyze and support integrations using IBM MQ Series ,SFTP / batch file transfers External interfaces and EDI pipelinesDocument upstream/downstream dependencies across MES modulesBasic 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 systemso 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 systemso 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 skillsBachelors in computer science or related fieldWhere 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.About NTT DATANTT DATA is a $30 billion business and technology services leader, serving 75% of the Fortune Global 100. We are committed to accelerating client success and positively impacting society through responsible innovation. We are one of the world's leading AI and digital infrastructure providers, with unmatched capabilities in enterprise-scale AI, cloud, security, connectivity, data centers and application services. our consulting and Industry solutions help organizations and society move confidently and sustainably into the digital future. As a Global Top Employer, we have experts in more than 50 countries. We also offer clients access to a robust ecosystem of innovation centers as well as established and start-up partners. NTT DATA is a part of NTT Group, which invests over $3 billion each year in R&D.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 @nttdata.com and @talent.nttdataservices.com email addresses. If you are requested to provide payment or disclose banking information, please submit a contact us form, .NTT DATA endeavors to make accessible to any and all users. If you would like to contact us regarding the accessibility of our website or need assistance completing the application process, please contact us at . This contact information is for accommodation requests only and cannot be used to inquire about the status of applications. NTT DATA is an equal opportunity employer. Qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or protected veteran status. For our EEO Policy Statement, please click here. If you'd like more information on your EEO rights under the law, please click here. For Pay Transparency information, please click here.Job SummaryJob number: 371888Date posted : 2026-06-04Profession: OtherEmployment type: Full time