- physicians – health, chronic illnesses
- safety engineers and technicians – health and safety in the workplace the provision of advice relating to hazards from dangerous substances, equipment for personal protection, and other elements of a safe workplace. They need a special training.
- chemical and process engineers – focus on plant safety to ensure safe production processes, fire and explosion prevention. Some of these engineers are registered, as required by law.
- environmental engineers – to ensure environmental safety such as the prevention of air and water pollution.
Authorities are also a critical part of the health and safety context because of the role they play in, flow and exchange of information.