# Team Leadership > Selected Engineer ApS work demonstrating Team Leadership — the achievements that prove it. - [Led the development, deployment, and support of over 30 GIS projects, demonstrating expertise in PostgreSQL, Bash, Python, JavaScript, GDAL, ArcGIS, PostGIS, and Mapbox technologies.](https://data.engineer.company/portfolio/led-the-development-deployment-and-support-of-over-35/)