Mainframe Developer

Mainframe TechnologiesIBM z/OS, OS/390, TSO/ISPF, JES2, SDSFIBM Utilities (REPRO, IDCAMS, IEBGENER, IEBCOPY, IEFBR14)Programming LanguagesCOBOL, JCLDatabasesIBM DB2, SPUFIDB2 Utilities (RUNSTATS, REORG, LOAD, UNLOAD)File Management & Data ProcessingVSAM, Syncsort (DFSORT), File-AID, File Master, Sequential FilesJob Scheduling & Workload AutomationControl-M, Batch Processing, Job Scheduling, Job Monitoring, Job Recovery, Batch Workflow ManagementSource Code & Change ManagementEndevor, Change Control Management, Version Control, Release ManagementServiceNow (if used for incident/change management)Debugging & TestingInterTest, Unit Testing, Integration Testing, Production Validation, Root Cause Analysis (RCA)Data Warehouse & AnalyticsTeradata, Enterprise Data Warehouse (EDW), Data Validation, Data Reconciliation, Data Quality Assurance (QA)Development MethodologiesAgile, Jira, SDLC, Incident Management, Problem Management, Production SupportCore CompetenciesMainframe Production Support (L2/L3)Batch Processing & AutomationIncident Resolution & TroubleshootingPerformance MonitoringBusiness Continuity & SLA ManagementProduction DeploymentsCross-functional CollaborationOffshore Team CoordinationTechnical DocumentationRoles & ResponsibilitiesProvided L2/L3 production support for mission-critical Enterprise Data Warehouse (EDW) applications running on IBM z/OS and Teradata platforms.Monitored, managed, and recovered batch jobs using Control-M to ensure successful completion of daily, month-end, and post-month processing within established SLA windows.Supported enterprise data processing for claims, encounters, pharmacy, member, provider, broker, wellness, and financial data across multiple lines of business.Developed, modified, and maintained COBOL programs, JCL, DB2 queries, and VSAM file processes to support business and operational requirements.Performed production incident analysis, troubleshooting, and root cause analysis (RCA), implementing permanent corrective actions to minimize recurring issues.Executed manual job restarts, dependency management, and batch recovery activities to maintain production availability and data integrity.Validated production data through reconciliation, QA testing, and business verification to ensure accuracy, completeness, and compliance with reporting requirements.Utilized TSO/ISPF, File-AID, File Master, SPUFI, InterTest, and SyncSort to analyze datasets, debug application issues, and perform file manipulation.Managed application code migrations and production deployments using Endevor in accordance with Change Management and SDLC processes.Collaborated with business users, developers, QA teams, DBAs, and infrastructure teams to resolve production issues and support application enhancements.Coordinated daily operational activities with offshore teams, including work allocation, knowledge transfer, issue tracking, and status reporting.Participated in Agile Scrum ceremonies, including sprint planning, backlog refinement, daily stand-ups, retrospectives, and release planning using Jira.Prepared technical documentation, operational procedures, production support runbooks, and knowledge transfer documents.Ensured compliance with IT governance, change control procedures, security standards, and audit requirements.Maintained production stability by proactively monitoring system health, identifying performance bottlenecks, and recommending process improvements.Supported scheduled maintenance, application releases, disaster recovery activities, and on-call production support for critical business applications.Skills: Mainframe DB2 - Application DevelopmentExperience Required: 8-10