The environmental health, safety, and security (EHSS) field is a growing. The BLS has this to say:
Occupational health and safety specialists and technicians collect data on and analyze many types of work environments and work procedures. Specialists inspect workplaces for adherence to regulations on safety, health, and the environment. Technicians work with specialists in conducting tests and measuring hazards to help prevent harm to workers, property, the environment, and the general public.
Occupational health and safety specialists and technicians work in a variety of settings, such as offices or factories. Their jobs often involve considerable fieldwork and travel. Most work full time.