Title: Migration Test Manager Data & Platform Migration Location: London / Hybrid Engagement: Fixed Term Contract or PAYE Contract Sector: Financial Services / Wealth Management Role Overview: We are looking for a highly experienced, hands-on Migration Test Manager to lead testing for a complex legacy-to-modern platform migration. This is a migration-specific role, not a generic test management position. The focus is heavily data-driven, with the majority of test coverage derived from mapping logic and ETL validation, rather than UI-based testing. The role requires someone who can lead, design, and execute testing personally, while managing a small test team and navigating a highly dynamic migration environment. Key Responsibilities: Design and own the migration test strategy, scope, and approach Lead end-to-end data migration testing, including ETL validation and reconciliation Translate data mapping specifications into robust migration test scenarios Validate data accuracy, completeness, and integrity across source and target platforms Manage defect triage, prioritisation, and resolution Provide clear, concise reporting to senior stakeholders Support go-live readiness, cutover testing, and post-migration validation Confidently challenge assumptions and push back where quality is at risk Operate effectively where mappings and target structures evolve iteratively Required Experience: Proven experience as a Migration Test Manager / Lead within financial services Strong understanding of data migration testing (not SIT/UAT) Experience testing migrations involving large, aged legacy datasets Strong ETL testing and data validation background Confident SQL skills for data interrogation and reconciliation Experience managing ambiguity and change in migration programmes Wealth management platform experience highly desirable Avaloq experience advantageous