Exempt services: Engineers

State laws recognize that certain areas of expertise are common to professionals other than engineers. They provide the following exemptions in:

Other professional licensees

The law doesn't prevent the practice of any other legally recognized profession or trade.

Operation and maintenance of machinery or equipment

The law doesn't prevent the practice of work ordinarily performed by persons who operate or maintain machinery or equipment.

Contractors

The law doesn't prevent the:

Mere execution, as a contractor, of work designed by a professional engineer.
or
The supervision of the construction of such work as a foreman or superintendent.

Employees of a professional licensee

The law doesn't prevent the work of an employee or subordinate of a person holding a certificate of registration, or an employee of a person practicing lawfully.

Industrial/manufacturing

The law doesn't prevent the work of a person rendering engineering services to a corporation, as an employee of such corporation, when:

The services are rendered in carrying on the general business of the corporation.
and
This general business doesn't consist, either wholly or in part, of the rendering engineering services to the general public.

Federal employees

The laws doesn't prevent practice of officers or employees of the government of the United States while engaged in the practice of engineering for the government of the United States.