Occupational health nursing is a medical specialty for nurses. As an occupational health nurse (OHN), you work in industries like construction and manufacturing to provide health education to prevent occupational workplace injuries and treat any injuries or ailments that happen on the job, like back pain or falls. You may provide preventative medical care to workers and be responsible for evaluating the workplace for potential hazards. You need to be a registered nurse (RN) in your state and have some training and knowledge about your industry of focus.