Senior Data Analyst – Data Migration & Semantic Modeling

Our client, a prominent public safety organization, is seeking a Senior Data Analyst to facilitate their digital transformation and legacy modernization. The role focuses on analyzing existing mainframe domains and translating complex data structures into a modern, future-oriented architecture using semantic modeling and ontologies.

• Analyze legacy domains, data models, and functional processes to capture core business logic and dependencies.
• Translate existing data structures into modern functional processes, integration concepts, and ontologies.
• Coordinate with architects, developers, and security specialists to ensure technical alignment across the project.
• Document business rules, data definitions, and detailed process requirements for the new ICT environment.
• Support the migration of legacy environments and analyze central logging systems for data exploitation.
• Facilitate workshops with domain experts to capture requirements and ensure the traceability of solutions.

• 8+ years in Business Analysis and Functional Analysis.
• 8+ years in Data Modelling and Semantic Modelling.
• 8+ years in Data Mapping and Impact Analysis.
• 8+ years documenting processes, data models, and business rules.
• 5+ years managing the migration of applications and data to new platforms.
• 3+ years working with Ontologies.
• 3+ years analyzing Logging, Audit Trails, and exploitation data.
• 1+ years analyzing Mainframe or legacy environments.
• You are proactive and solution-oriented with strong analytical and workshop facilitation skills.
• You have active knowledge of Dutch, French, and English.

Nice to Haves

• Experience with functional validation of migrated processes and data.
• Proven track record in domain analysis within complex organizational structures.

• Start date: 15/09/2026.
• Duration: 4 months (extendable).
• Work regime: Full-time.
• Location: Brussels.
• Working model: Hybrid (minimum 2 days per week onsite).
• Contract: open to both permanent employees and freelancers.