Qlik → Tableau Enterprise Migration

Context & Challenge

A major financial institution needed to migrate its core business reporting infrastructure from Qlik to Tableau — a large-scale programme covering 10+ business-critical reports used daily by finance, operations, and executive teams. The existing Qlik reports carried years of accumulated business logic, custom scripts, and user-specific views that had to be faithfully replicated without disrupting day-to-day operations. The migration also had to absorb organizational complexity: multiple business units with different priorities, an IT team managing infrastructure constraints, and end-users with varying levels of data literacy.

Approach

I led the end-to-end migration as both technical architect and project coordinator. The methodology started with a discovery phase: auditing each Qlik report to document data flows, calculated fields, set analysis logic, and user access patterns. For each report, I rebuilt the logic in Tableau using best-practice data modelling — normalizing extracts, rewriting calculations as native Tableau expressions, and restructuring workbook architecture for long-term maintainability. Running both environments in parallel for a defined transition window allowed business teams to validate outputs side-by-side before final cutover. IT coordination covered Tableau Server provisioning, Active Directory integration, and permissions architecture. Stakeholder management included aligning department heads on the migration calendar, running training sessions for power users, and producing documentation for the self-service analytics layer.

Results

All 10+ reports were delivered on time and on budget — a rare outcome for enterprise platform migrations of this scale. Post-migration, the consolidation to Tableau reduced licensing complexity and gave teams access to a more modern, self-service analytics environment with better mobile rendering, subscription alerts, and a lower barrier to creating ad-hoc analyses. The structured migration methodology documented during this project — audit, rebuild, parallel validation, cutover — now serves as a repeatable framework for similar BI platform transitions.

This project was delivered by Klomèna YEO, freelance Analytics Engineer specialised in Finance & HR data. Available for similar engagements in France and internationally.