Mechanical Engineer Environmental roles often involve designing and optimizing HVAC systems with energy efficiency and indoor air quality in mind, developing pollution control equipment, or improving manufacturing processes to reduce environmental impact. You might collaborate with environmental scientists, architects, and civil engineers on sustainability initiatives, such as waste heat recovery or renewable energy integration. Daily tasks can include system modeling, compliance documentation, site assessments, and overseeing installation of environmentally friendly equipment. These professionals are central to helping organizations meet both operational and environmental goals.