Position: Mainframe Modernization Engineer RPG to COBOL / GCP

Engagement: Mainframe Replatforming Project

Role Overview:

We are looking for experienced Mainframe Modernization Engineers to support a large-scale Mainframe Replatforming initiative. The initial focus will be on RPG-to-COBOL conversion within the mainframe environment, with responsibilities expanding into application testing, modernization, migration to Google Cloud Platform (GCP), and mainframe data remediation.

The ideal candidate will have strong hands-on experience with RPG, COBOL, JCL, CICS, and mainframe systems, along with exposure to application modernization and cloud migration.

Key Responsibilities:

Analyze existing RPG applications/programs and support their conversion to COBOL on the mainframe.

Review converted COBOL programs to ensure functional equivalence with existing RPG functionality.

Perform unit, functional, integration, and regression testing of converted applications.

Support JCL testing between mainframe and GCP environments.

Assist with the modernization and migration of JCL workloads to GCP.

Perform CICS application and transaction testing across mainframe and GCP environments.

Support the migration and validation of CICS-related functionality as part of the GCP transition.

Analyze mainframe data-quality issues, identify root causes,



and implement permanent fixes rather than temporary corrections.

Troubleshoot application, batch-processing, integration, and data-related issues during conversion and migration.

Work closely with application, mainframe, cloud, testing, and migration teams throughout the replatforming program.

Support technical documentation related to conversions, testing, defects, migration, and remediation.

Required Skills:

Robust hands-on experience with COBOL

Experience working with RPG applications/code

Strong knowledge of JCL

Experience with CICS

Solid understanding of mainframe application architecture and batch processing

Experience analyzing and troubleshooting legacy mainframe applications

Strong debugging, testing, and root-cause analysis skills

Experience with data analysis and remediation within mainframe environments

Preferred Skills:

Experience with mainframe modernization or replatforming programs

Exposure to Google Cloud Platform (GCP)

Experience migrating or integrating mainframe workloads with cloud platforms

Experience validating applications across legacy and target environments

Knowledge of automated conversion, code analysis, or testing approaches for legacy modernization

Experience working on complex enterprise application migration programs

📌 Mainframe Modernization Engineer (Hyderabad)
🏢 Nsight
📍 Hyderabad