Job Title: Technical Business Analyst (AS400 / SICS)
Location: Singapore (onsite)
Experience: 8+ years
Role type: Contract

Role Overview
We are seeking experienced Technical Business Analysts with strong AS400 expertise to support a major core banking migration program. This role focuses on analysing the existing AS400-based systems, performing reverse engineering, and producing detailed technical and functional documentation to support the transition to a new COTS platform.
This is a business–technical hybrid role with no hands-on development, but deep technical understanding of AS400 applications, file structures, and integrations is essential.

Key Responsibilities

Analyse the existing AS400 environment, including applications, programs, data models, database structures, and system workflows.
Perform reverse engineering of legacy AS400 components to understand current functionality, logic, and dependencies.
Document AS400 system behaviour, process flows, file mappings, data mappings, integration points, and business rules.
Work closely with architects, product teams, and vendor teams involved in the migration to a COTS platform.
Review legacy jobs, CL programs, RPG logic (read-only), file definitions, and batch processes to capture functional and technical details.
Translate technical findings into clear, structured documentation for migration and development teams.
Participate in walkthroughs, requirement clarification sessions, and solution discussions to ensure accurate understanding of the current system.
Support gap analysis, impact assessment, and mapping of legacy functionalities to new COTS product capabilities.
Act as a bridge between business, technology, vendor teams, and migration specialists.
Ensure documentation quality and completeness to support seamless knowledge transfer.

Must-Have Skills & Experience

8+ years of experience working with AS400 technologies (CL, RPG, DB2/400 concepts, job scheduling, file structures).
Strong experience analysing AS400-based applications in financial services or banking environments.
Proven capability in reverse engineering legacy systems and producing detailed documentation such as:
- File mappings
- Data flow diagrams
- Functional flows
- Technical specifications
- Interface documentation
Ability to interpret AS400 components without performing actual development.
Strong understanding of core banking processes, batch jobs, data models, and system dependencies.
Excellent analytical thinking, problem-solving, and communication skills.
Ability to work independently and manage ambiguity typical in migration projects.

Good-to-Have Skills

Knowledge or experience with SICS (Silverlake Integrated Card System).
Experience working on core banking migration projects (legacy-to-COTS).
Understanding of cards systems, payments, or transaction processing.
Exposure to vendor-driven implementations (Temenos, Silverlake, Finastra, etc.).

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Technical Business Analyst (AS400 / SIC...