You'll need to be a registered nurse and have the support of your employer to apply for occupational health nursing posts.
You'll take an approved programme in Specialist Community Public Health Nursing - Occupational Health Nursing (SCPHN - OHN).
The entry requirements vary between universities offering the programme, but usually have no minimum period of post-registration experience.
The SCPHN qualification can also be used for the health visiting or school nursing pathways.