1. Levels of nursing expertise described by Benner--novice, advanced beginner, competent, proficient, and expert--hold potential for fostering improved practice among occupational health nurses. 2. Lacking a clear understanding of the full potential of the role of the occupational health nurse, employers may not reward the development of clinical expertise that incorporates employee advocacy within the context of written standards and guidelines. 3. Expertise in occupational health nursing can be fostered by job descriptions that incorporate a broader view of nursing (one that stresses judgment and advocacy), retention and longevity, innovative strategies for consultation and collegial interaction to foster mentoring, and distance learning strategies.