Advanced SQL and deep hands-on experience building with modern data stacks, such as cloud warehouses (Snowflake, BigQuery, Databricks, or Redshift), transformation frameworks (dbt or equivalent), ingestion tooling, semantic layers, and BI platforms (Looker, Power BI, Tableau, Sigma, or similar). Success here means moving seamlessly between strategy and execution by designing the long-term vision for the function while personally getting into the data, building integrations and models, creating dashboards, and solving complex business questions.