Senior Mainframe Developer, Senior Mainframe Engineer

BHARATH CR

Senior Mainframe Developer, Engineer

913-***-**** New Haven, CT 06516 Open Nationwide

Summary of Qualifications:

oAccomplished Mainframe Developer / Engineer with 11+ years of experience designing, developing, enhancing, and supporting enterprise applications on IBM z/OS across Banking, Financial Services, Healthcare (MMIS), and Pharma domains.

oStrong technical expertise in COBOL, JCL, Db2 for z/OS, CICS, VSAM, and SQL, supporting high-volume batch processing, online transaction systems, and business-critical enterprise applications.

oExtensive experience in ACH payment processing, investment operations, financial reporting, healthcare claims, member and provider management, and pharmaceutical order and inventory systems.

oComprehensive experience across the Software Development Life Cycle (SDLC), including requirements analysis, application development, enhancements, testing, debugging, production deployments, and ongoing maintenance.

oStrong background in COBOL-DB2 development, SQL optimization, JCL batch processing, and workload automation using CA7, Control-M, and IBM Workload Scheduler (TWS/IWS), improving application performance and processing efficiency.

oProven expertise in production support, incident resolution, root cause analysis, and batch recovery, troubleshooting COBOL abends, DB2 errors, JCL failures, and scheduling issues using SDSF, JES logs, Abend-Aid, Expeditor, and File-Aid.

oHands-on experience with IBM MQ messaging and mainframe-to-distributed integration, including queue managers, channels, clustering, MFT, and REST/SOAP service integrations.

oExperience with Python scripting, Ansible automation, and performance monitoring using OMEGAMON, Dynatrace, RMF, SMF, and WLM to support operational efficiency and application reliability.

oExperienced in application version control, release management, and production deployments using ISPW, Endevor, Git, ServiceNow, and Quality Center, following enterprise security and regulatory requirements.

oStrong collaboration and technical ownership skills, working across development, QA, business, and infrastructure teams, contributing to code reviews, mentoring, documentation, and successful project delivery.

Education:

oMaster’s Degree in Computer Science (2019 Graduate) University of New Haven – West Haven, CT

oBachelor’s Degree in Electronics & Communication Engineering (2013 Graduate) Sathyabama University – Chennai, India

Professional Experience:

Client: Bank of America – Charlotte, NC Aug 2024 – Present

Role: Senior Mainframe Developer / Engineer

Project: ACH Payment Processing

oDevelop, enhance, and maintain COBOL-based batch applications and CICS online transactions supporting high-volume ACH payment processing on IBM z/OS.

oDesign and implement application enhancements, including ACH file validation, data transformation, and transaction processing in accordance with NACHA requirements and enterprise banking standards.

oDevelop and optimize COBOL programs, embedded DB2 SQL, JCL procedures, and VSAM file processing to support reliable execution of critical banking transactions.

oSupport mainframe-to-distributed system integration using IBM MQ, DB2, CICS, and REST/SOAP services, ensuring reliable communication and data exchange across enterprise applications.

oSupport IBM MQ messaging environments, including queue managers, channels, clustering, publish/subscribe, and Managed File Transfer (MFT), troubleshooting configuration and message-processing issues.

oParticipate in MQ high-availability support activities involving clustering and RDQM, collaborating with infrastructure teams to maintain messaging availability and operational stability.

oDevelop, maintain, and optimize complex JCL batch workflows supporting daily, weekly, and monthly ACH processing cycles within established SLA requirements.

oManage batch scheduling and workload automation using CA7, Control-M, and IBM Workload Scheduler (TWS/IWS), including job dependencies, calendars, triggers, and event-based execution.

oPerform batch performance optimization through JCL restructuring, DB2 SQL tuning, and workflow improvements to reduce processing delays and improve operational efficiency.

oDevelop Python scripts for operational automation, monitoring, and reporting, reducing repetitive manual activities across batch processing and production support.

oUtilize Ansible for deployment and configuration automation, including MQ-related operational activities and application release support.

oMonitor application performance and investigate processing bottlenecks using OMEGAMON, Dynatrace, SDSF, and JES logs.

oDiagnose and resolve complex production incidents involving COBOL abends (S0C7), DB2 errors, JCL failures, dataset contention, scheduling conflicts, and MQ messaging issues.

oExecute batch job restarts, reruns, and recovery procedures while validating data integrity and coordinating upstream and downstream application dependencies.

oProvide production support for business-critical ACH applications, performing root cause analysis, incident resolution, and preventive troubleshooting to maintain processing stability and SLA compliance.

oSupport application releases and environment migrations across DEV, TEST, and PROD using ISPW and Git-based version control workflows.

oCollaborate with business analysts, QA, application development, and infrastructure teams on requirements, application enhancements, testing, defect resolution, and production deployments.

oParticipate in peer code reviews, technical documentation, and knowledge-sharing activities, supporting application maintainability and development standards.

oManage incidents, problems, and change requests through ServiceNow while following enterprise security, audit, and change management procedures.

Environment: IBM z/OS, COBOL, JCL, Db2 for z/OS, CICS, VSAM, IBM MQ, REST/SOAP, CA7, Control-M, IBM Workload Scheduler (TWS/IWS), SDSF, JES2, File-Aid, OMEGAMON, Dynatrace, Python, Ansible, ISPW, Git, ServiceNow

Client: IU Health – Indianapolis, IN Jan 2022 – July 2024

Role: Senior Mainframe Developer / Engineer

Project: Healthcare MMIS – Claims, Member & Provider Processing

oDesigned, developed, and maintained COBOL-DB2 applications supporting healthcare MMIS claims processing, member management, and provider-related systems on IBM z/OS.

oDeveloped and enhanced COBOL programs, embedded DB2 SQL, JCL procedures, and VSAM file processing to support accurate and reliable healthcare data transactions.

oDeveloped and optimized DB2 SQL queries and stored procedures, improving application performance and reducing processing overhead across large healthcare datasets.

oSupported CICS online transaction processing, troubleshooting application errors, transaction failures, and performance issues affecting healthcare operations.

oSupported mainframe-to-distributed application integration using IBM MQ, including message processing, queue configuration, channel support, and troubleshooting integration-related issues.

oDeveloped, maintained, and optimized complex JCL batch workflows supporting healthcare claims, member, and provider processing within established SLA requirements.

oManaged batch scheduling and workload automation using CA7 and IBM Workload Scheduler (TWS/IWS), including job dependencies, calendars, triggers, and event-based execution.

oPerformed batch processing optimization through JCL restructuring, DB2 query tuning, and job dependency improvements to enhance processing efficiency and reduce operational delays.

oMonitored critical batch cycles, investigated job failures, and executed reruns, restarts, and recovery procedures to maintain processing continuity and data integrity.

oPerformed application debugging and abend analysis using SDSF, JES logs, Abend-Aid, Expeditor, and File-Aid to identify and resolve COBOL, JCL, DB2, and dataset-related issues.

oProvided 24x7 production support for business-critical healthcare applications, performing root cause analysis, incident resolution, and preventive troubleshooting to maintain application availability.

oAnalyzed application performance and workload behavior using RMF, SMF, and WLM, collaborating with infrastructure teams to investigate processing bottlenecks and capacity-related issues.

oSupported application operations within Parallel Sysplex and LPAR environments, coordinating with z/OS infrastructure teams on system availability, workload distribution, and performance-related activities.

oCollaborated with infrastructure teams during system upgrades, maintenance, and environment changes, supporting application validation and production stability.

oPerformed VSAM dataset validation, data correction, and file maintenance using File-Aid to support accurate healthcare data processing and reconciliation.

oParticipated in application enhancements, system testing, defect resolution, and release management across development, testing, and production environments.

oWorked with business analysts, QA teams, and infrastructure specialists to implement application changes while supporting HIPAA requirements and enterprise data security standards.

oParticipated in peer code reviews, technical documentation, and knowledge-sharing activities to improve application maintainability and troubleshooting efficiency.

oTracked defects, testing activities, and application issues using Quality Center while maintaining documentation for batch workflows, production procedures, and system enhancements.

Environment: IBM z/OS, COBOL, JCL, Db2 for z/OS, CICS, VSAM, IMS, IBM MQ, CA7, IBM Workload Scheduler (TWS/IWS), SDSF, JES2, File-Aid, Abend-Aid, Expeditor, RMF, SMF, WLM, Parallel Sysplex, LPAR, Quality Center, Endevor

Client: Fidelity Investments – Durham, NC July 2019 – Dec 2021

Role: Senior Mainframe Developer / Engineer

Project: Investment Processing & Financial Reporting Systems

oDesigned, developed, and enhanced COBOL-based mainframe applications supporting investment processing, financial reporting, and enterprise transaction workflows on IBM z/OS.

oDeveloped and maintained COBOL programs, embedded DB2 SQL, JCL procedures, and VSAM file processing to support financial data processing, reporting accuracy, and application reliability.

oWorked with DB2 and IDMS databases, developing and optimizing database access logic, SQL queries, and DB2 stored procedures to improve application performance and data retrieval efficiency.

oDeveloped and validated SQL queries using QMF and SPUFI to support financial reporting, data analysis, reconciliation, and application testing.

oPerformed application enhancements, technical impact analysis, and code modifications based on business requirements, ensuring compatibility with existing mainframe applications.

oDeveloped, maintained, and optimized JCL batch workflows supporting scheduled investment processing, financial reporting, and high-volume data operations.

oSupported batch scheduling and workload management using Control-M, monitoring job dependencies, execution sequences, and critical processing timelines.

oInvestigated batch processing failures, scheduling issues, and data-related errors, implementing corrective actions and coordinating job recovery to maintain processing continuity.

oPerformed performance tuning of COBOL programs, DB2 queries, and batch processing workflows to improve execution efficiency and application stability.

oWorked with VSAM datasets to support high-volume financial data processing, validation, and data integrity across application workflows.

oSupported integration between mainframe applications and upstream/downstream enterprise systems, ensuring accurate data exchange and processing consistency.

oPerformed application debugging and defect resolution using Expeditor and File-Aid, analyzing program execution, data conditions, and processing logic.

oParticipated in unit testing, system integration testing, and user acceptance testing (UAT), developing test cases and validating application functionality using Quality Center.

oManaged application version control, code migrations, and release activities using Endevor, supporting controlled deployments across development, testing, and production environments.

oProvided production support for financial applications, investigating application failures, resolving incidents, and maintaining processing reliability within established SLA requirements.

oCollaborated with business analysts, QA teams, operations, and infrastructure specialists to translate business requirements into technical solutions and coordinate application releases.

oParticipated in peer code reviews, technical documentation, and application maintenance activities to support coding standards, system reliability, and knowledge sharing.

oFollowed enterprise security, change management, and regulatory requirements throughout application development, testing, and production support activities.

Environment: IBM z/OS, COBOL, JCL, Db2 for z/OS, IDMS, VSAM, Control-M, Endevor, QMF, SPUFI, File-Aid, Expeditor, Quality Center

Employer: Cipla - Hyderabad, India Jun 2013 – July 2017

Role: Mainframe Developer / Engineer

Project: Pharmaceutical Order Processing & Inventory Management

oDesigned, developed, and maintained COBOL-based mainframe applications supporting pharmaceutical order processing, inventory management, and business operations on IBM z/OS.

oDeveloped and enhanced COBOL programs, JCL procedures, DB2 SQL queries, and VSAM file processing to support order transactions, inventory updates, and operational reporting.

oWorked with DB2 databases, developing SQL queries, supporting table design, and performing data validation using SPUFI to maintain accurate business transactions.

oDeveloped and maintained JCL batch workflows supporting daily order processing, inventory updates, and scheduled reporting activities.

oMonitored batch job execution, investigated processing failures, and performed corrective actions to ensure timely completion of business-critical operations.

oWorked with VSAM datasets to support efficient storage, retrieval, and processing of pharmaceutical inventory and order information.

oPerformed COBOL program debugging, defect analysis, and application troubleshooting to resolve processing errors and improve system reliability.

oAssisted in optimizing COBOL programs, DB2 queries, and JCL batch processes to improve execution efficiency and reduce operational delays.

oSupported batch process automation and workflow improvements to minimize repetitive manual activities and improve operational consistency.

oPerformed data validation, reconciliation, and correction activities to maintain data accuracy and consistency across order processing and inventory systems.

oSupported integration between mainframe applications and other enterprise systems, ensuring consistent data exchange and processing accuracy.

oParticipated in unit testing, system testing, and application validation to verify functionality and support successful implementation of enhancements.

oAssisted with application deployments, release activities, and migration of program changes across development, testing, and production environments.

oProvided application maintenance and production support, investigating incidents, resolving defects, and supporting the stability of daily business operations.

oFollowed organizational development standards, data security practices, and applicable regulatory requirements throughout application development and support activities.

Environment: IBM z/OS, COBOL, JCL, Db2 for z/OS, VSAM, SPUFI

Technical competencies:

Mainframe Programming: COBOL, JCL, SQL, Embedded SQL, Python (Automation & Scripting)

Mainframe Technologies: IBM z/OS, TSO/ISPF, JES2, SDSF, CICS, VSAM, IDMS, IMS, Parallel Sysplex, LPAR, Coupling Facility

Database & Data Management: IBM Db2 for z/OS, DB2 Stored Procedures, SQL Query Optimization, VSAM Datasets, SPUFI, QMF, Data Validation, Data Reconciliation

Batch Processing & Scheduling: CA7, Control-M, IBM Workload Scheduler (TWS/IWS), JCL Batch Processing, Job Scheduling, Job Dependencies, Calendars, Triggers, Reruns, Restarts, Batch Recovery, SLA Management

Messaging & Integration: IBM MQ, MQ Series, Queue Managers, Channels, MQ Clustering, Publish/Subscribe, Managed File Transfer (MFT), Mainframe-to-Distributed Integration, REST APIs, SOAP Web Services

Automation & DevOps: Python Scripting, Ansible, Git, ISPW, Endevor, Deployment Automation, Configuration Automation, Release Management

Production Support & Debugging: SDSF, JES Logs, Abend-Aid, Expeditor, File-Aid, COBOL Abend Analysis, Root Cause Analysis (RCA), Incident Management, Production Recovery

Performance & Monitoring: OMEGAMON, Dynatrace, RMF, SMF, WLM, COBOL Performance Tuning, DB2 SQL Tuning, JCL Optimization, Batch Performance Analysis

Mainframe Operations & Support: JES2, LPAR, Parallel Sysplex, Coupling Facility, SMP/E (Exposure), IPL/PTF/APAR Activities (Infrastructure Team Support)

Testing & Change Management: Quality Center, ServiceNow, Unit Testing, System Integration Testing, UAT, Code Reviews, Change Management, Production Deployments

Security & Compliance: HIPAA, NACHA, Enterprise Data Security, Audit Compliance, Access Control Practices

Cloud & Hybrid Exposure: AWS (Limited Exposure), IBM Cloud (Limited Exposure), Hybrid Mainframe Integration

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