The ROH is a national credential that shows you meet professional standards in occupational hygiene, the science of spotting and controlling workplace health hazards. It is voluntary, so no one is required to hold it, but many employers value it.
Official website ↗Occupational hygienists protect workers from hazards such as chemicals, noise, dust, fumes, radiation and poor air quality. They measure exposures, assess the risks and recommend ways to control them. The Registered Occupational Hygienist, or ROH, credential is issued by the Canadian Registration Board of Occupational Hygienists (CRBOH) and is recognized across Canada.
Holding the ROH tells employers, clients and regulators that your knowledge and experience have been reviewed by your peers. It can help you move into senior roles, take on consulting work or stand out in a competitive job market. It is useful in many safety and health careers, including industrial hygienist, occupational health and safety specialist, environmental health and safety manager, safety inspector, environmental compliance inspector, environmental regulator, dangerous goods specialist and aviation safety roles. Because it is voluntary, you can still work in these fields without it.
The ROH process includes a written exam that tests your knowledge across the main areas of occupational hygiene. Questions cover topics such as hazard recognition, exposure assessment, control methods and professional practice. Check with CRBOH for the current exam format, content outline and any study resources it recommends.
To keep your ROH, you need to stay active in the profession and keep learning. CRBOH expects you to take part in ongoing professional development and to renew your registration on a regular cycle. Confirm the current renewal rules and reporting requirements with CRBOH.