Those who keep us healthy - Medical staff like doctors, nurses, paramedics 2. Those who keeps us safe - Police, firefighters, soldiers 3. Those who help us commute - People working for buses, trains, planes, cabs 4. Those who grow food - Farmers 5. Those who maintain infrastructure - Masons, plumbers, janitors, electricians etc. Besides above, there are various fields of community workers that are essential for the community to function smoothly.