Mainframe Technical Specialist

About the role

Act as the subject matter expert (SME) for Hogan core banking systems, reverse-engineering legacy modules and translating embedded business logic into modern, canonical specifications to support migration to the Pismo platform.

Responsibilities

• Reverse-engineer Hogan modules including IDS, CIS, PEP+, ULS, DDA, and rail-specific components
• Analyze and document business rules embedded in COBOL programs into structured, reusable specifications
• Design and build data extraction and integration interfaces using: VSAM, DB2, MQ
• Enable dual-write mechanisms, rollback strategies, and legacy-side validation during migration
• Support legacy system stabilization and change control processes in production
• Collaborate with architecture and development teams to ensure accurate behavior replication in Pismo
• Participate in decommissioning strategy for legacy functionalities

Requirements

• 10+ years of hands-on experience with DXC Hogan core banking platform
• Strong expertise in: COBOL, JCL, CICS, DB2, VSAM, MQ
• Proven experience in: Legacy system analysis and reverse engineering; Core banking modernization / migration programs
• Strong understanding of production change management and control processes
• Ability to translate complex legacy logic into modern functional/technical documentation
• Prior experience in Hogan to cloud-native core migration (e.g., Pismo, Mambu)
• Exposure to ISO 20022 mapping and payments transformation
• Experience with mainframe DevOps tools (CA Endevor, Changeman)
• Knowledge of parallel-run and reconciliation strategies