A public health engineer uses design tools to develop systems intended to prevent illness or injury to the public. In this career, you most often work in government agencies, but you can also work for a consulting company in the private sector, managing environmental health programs and facilities. Your job duties include advising the local population, government officials, and businesses on safety regulations needed to comply with public health best practices. You enforce both state and city sanitary codes and health laws, responding and investigating improper conditions in facilities like municipal water supplies and writing detailed technical reports on your findings. You may also investigate swimming pools, restaurants, or even industrial companies.