Functional / Data Analyst – Legacy & Data Migration Job ID: JP055049

Functional / Data Analyst – Legacy & Data Migration

About the Role

We are looking for an experienced Functional / Data Analyst to support the modernization of legacy and mainframe-based systems. The role focuses on analyzing existing applications, data structures and business processes and translating them into modern data models, functional processes and integration concepts.

Key Responsibilities

• Analyze legacy/mainframe applications, data structures, data flows and business processes.
• Document business logic, data definitions, dependencies and functional requirements.
• Perform data mapping, impact analysis and semantic modelling.
• Translate legacy requirements into modern functional processes, data models and integration concepts.
• Contribute to the development of ontologies and semantic models.
• Analyze and exploit logging, audit trails and data-query information.
• Support the migration of applications, processes and data to modern platforms.
• Validate migrated processes and data to ensure accuracy and consistency.
• Collaborate with business users, architects, developers, DBAs, security specialists and project managers.
• Facilitate workshops with domain experts and document outcomes.

Requirements

• Expert experience in Business Analysis and Functional Analysis.
• Strong experience with data modelling, semantic modelling, data mapping and impact analysis.
• Experience analyzing legacy/mainframe environments.
• Experience with application, process and data migration.
• Knowledge of ontologies and semantic models.
• Experience analyzing logging, audit trails and operational data.
• Strong documentation, analytical and problem-solving skills.
• Ability to bridge business, data, architecture and technology.
• Dutch, French and English proficiency.

Practical Information

• Start: 15 September 2026
• Duration: Until end of 2026, extendable
• Workload: Full-time (40 hours/week)
• Location: Brussels
• Work model: Hybrid – minimum 2 days per week onsite