I have worked in occupational health in 4 different companies and all positions were different. In 2 of the positions, I had a full time physician at the plant, so we were more or less a full service ER, performing physicals, keeping up with OSHA regulations, coordinating worker's injuries with outside treating physicians, acting as case managers and direct patient care. The other 2 positions we have no local physician and had to refer injuries out to a contracted service. I now coordinate the health and wellness program as well as participate in the safety teams . My job is about 70% administrative. I would recommend the web site of the AAOHN for additional resources and info regarding certification in the field.