Applicants who currently hold a certification (e.g. CIH) endorsed by the National Accreditation Recognition Committee of the International Occupational Hygiene Association (IOHA) are exempt from the Registered Occupational Hygienist (ROH®) written examination component and are eligible to challenge the ROH® oral examination directly.

Applications for the examination will not be reviewed until all the information has been received by the Registrar: An application is considered complete when the following has been forwarded to CRBOH:

1. Completed and signed candidate application form
2. Payment of application fee ($350)