Roger M. Nelson

National Institute for Occupational Safety & Health conducts research and makes recommendations for the prevention of work-related injury and illness. It prevents disability and death by gathering information, conducting scientific research and translating the knowledge gained into products and services, including scientific information products, training videos, and recommendations for improving safety and health in the workplace. The firm also owns and operates laboratories. The company is headquartered in Washington, DC.

MedRisk LLC engages in the provision of managed physical medicine and diagnostic imaging services. It offers functional capacity evaluations, telerehabilitation, and other related services. The company was founded by Shelley L. Boyce in 1994 and is headquartered in King of Prussia, PA.