Mainframe Developer

Role: Mainframe Developer
Skills: Mainframe DB2 - Application Development

Experience Required: 8-10

· Mainframe Technologies
IBM z/OS, OS/390, TSO/ISPF, JES2, SDSF
IBM Utilities (REPRO, IDCAMS, IEBGENER, IEBCOPY, IEFBR14)
· Programming Languages- COBOL, JCL
· Databases- IBM DB2, SPUFI,DB2 Utilities (RUNSTATS, REORG, LOAD, UNLOAD)
· File Management & Data Processing- VSAM, SyncSort (DFSORT), File-AID, File Master, Sequential Files
· Job Scheduling & Workload Automation- Control-M, Batch Processing, Job Scheduling, Job Monitoring, Job Recovery, Batch Workflow Management
· Source Code & Change Management
Endevor, Change Control Management, Version Control, Release Management
ServiceNow (if used for incident/change management)
· Debugging & Testing- InterTest, Unit Testing, Integration Testing, Production Validation, Root Cause Analysis (RCA)
· Data Warehouse & Analytics- Teradata, Enterprise Data Warehouse (EDW), Data Validation, Data Reconciliation, Data Quality Assurance (QA)
· Development Methodologies- Agile, Jira, SDLC, Incident Management, Problem Management, Production Support

Core Competencies
Mainframe Production Support (L2/L3)
Batch Processing & Automation
Incident Resolution & Troubleshooting
Performance Monitoring
Business Continuity & SLA Management
Production Deployments
Cross-functional Collaboration
Offshore Team Coordination
Technical Documentation

Roles & Responsibilities

· Provided 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.