Sia Partners is hiring a Senior Data Analyst

We are hiring a Power BI Developer to support our global internal teams (Finance, HR, Strategy, Corporate Functions) by maintaining, improving, and delivering high-impact business intelligence dashboards, datasets, and analytics solutions. This role is critical for strengthening our internal reporting systems and driving data-backed decision-making across the organization. Key Responsibilities - Lead the design, implementation, and upkeep of ETL / data pipelines (from source files through staging layers into the DWH), ensuring data correctness and efficiency. - Architect and evolve semantic models / reusable datasets: define dimensions, hierarchies, and KPI definitions that align with business needs. - Build, review, and optimize complex SQL-based transformations and views that feed into dashboards and reports. - Develop, optimize, and maintain all aspects of Power BI dashboards: DAX measures, visuals and UXUI design, Power Query (M), security through RLS, OLS, and access rights, report publication and refresh. - Lead and manage complete BI projects with Corporate teams from Business requirement to delivery thus including : requirements gathering, scoping, estimating work and timeline, designing specs, developing, validating with business stakeholders, deploying, and monitoring in production. - Identify performance bottlenecks (in SQL queries or the data model) and optimize query speed, resource usage, and refresh times to improve user experience. - Maintain and initiate documentation of data schema, data lineage, dashboards, and datasets; QA and perform tests / validation to ensure data integrity. - Mentor junior analysts; raise and enforce standards and best practices in SQL, data modelling, and BI development.