Mathieu developed a dataset metadata configuration for Remote Settings CDN logs aggregates in the mozilla/bigquery-etl repository, focusing on data governance and controlled access across multiple environments. He modeled dataset metadata using YAML, designed access controls, and implemented environment-specific naming conventions to support safe production and non-production deployments. His work enabled admin views and workgroup access, improving data discoverability and readiness for analytics pipelines. By leveraging BigQuery, ETL processes, and data engineering best practices, Mathieu addressed the need for traceable, auditable data management. The project demonstrated depth in metadata modeling and governance, though it was limited in scope to a single feature.