An Occupational Health Nurse (OHN) is a registered nurse who applies nursing principles to promote and restore worker health, prevent illness and injury, and protect against work-related hazards. OHNs may work in corporate settings, occupational health clinics, government agencies, or as consultants. Their responsibilities include: coordinating drug and alcohol testing programs, managing workplace injury cases, performing health screenings and surveillance exams, conducting ergonomic assessments, managing workers' compensation cases, and developing wellness programs. Advanced certification is available through the American Board for Occupational Health Nurses (ABOHN) as COHN (Certified Occupational Health Nurse) or COHN-S (Specialist).