Mass. Gen. Laws ch. 21A § 19D
Effective on and after one year after publication in the Massachusetts Register of the first regulations promulgated pursuant to section nineteen B, no person shall be, or act as, or advertise as, or hold himself out to be, or represent himself as being, a hazardous waste site cleanup professional unless that person is in possession of a valid license issued by the board.
The provisions of sections nineteen through nineteen J, inclusive, and of chapter twenty-one E, and regulations promulgated pursuant thereto, shall not restrict or prohibit and shall not be construed as restricting or prohibiting any person who is a full-time employee or may become a full-time employee of a person who is or may potentially be an owner or operator as defined in said chapter twenty-one E or of a person who is or may potentially be liable pursuant to the provisions of said chapter twenty-one E from being licensed as a hazardous waste site cleanup professional if so qualified pursuant to standards established, through regulation, by the board. The provisions of section nineteen through nineteen J, inclusive, and of chapter twenty-one E, and regulations promulgated thereto, shall not restrict or prohibit and shall not be construed as restricting or prohibiting any such full-time employee, if so licensed, from undertaking any activity permitted by regulations for hazardous waste site cleanup professionals at the request of such employee's employer.
Mass. Gen. Laws ch. 21A, § 19D