Technical Business Analyst (AS 400 / SICS)

Roles & Responsibilities

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

Proven capability in reverse engineering legacy systems and producing detailed documentation such as :

Good-to-Have Skills

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Tell employers what skills you have

Reverse Engineering

Transaction Processing

Producing

As400

Ability To Work Independently

CL

Architects

RPG

AS400 system

Banking

Business Analyst

Scheduling

Bridge

Financial Services

Mapping