Why It's a Great Opportunity:  We are seeking an experienced Principal Air Quality Compliance Engineer to lead and perform complex technical and regulatory work supporting our facilities. This is a hands-on role. You will perform air quality engineering and regulatory work from start to finish - developing defensible emissions calculations and inventories, preparing permit applications and compliance documentation, interpreting regulatory requirements, and evaluating equipment and process changes to ensure compliance with federal and Colorado air quality regulations. You will support Metro’s operations and capital project teams to integrate environmental requirements into planning, design, construction, and implementation. You will also provid