This is another common misunderstanding. There is an "industrial exception" for engineers working under the umbrella of a corporation. From Texas engineer boar

This is another common misunderstanding. There is an "industrial exception" for engineers working under the umbrella of a corporation. From Texas engineer board code (I think other states are similar): § 1001.057. Employee of Private Corporation or Business Entity (a) This chapter shall not be construed to apply to the activities of a private corporation or other business entity, or the activities of the full-time employees or other personnel under the direct supervision and control of the business entity, on or in connection with: (1) reasonable modifications to existing buildings, facilities, or other fixtures to real property not accessible to the general public and which are owned, leased, or otherwise occupied by the entity; or (2) activities related only to the research, development, design, fabrication, production, assembly, integration, or service of products manufactured by the entity. [Sections (b) and (c) omitted for clarity] (d) For purposes of this section, “products manufactured by the entity” also includes computer software, firmware, hardware, semiconductor devices, and the production, exploration, and transportation of oil and gas and related products.” Meaning, engineers can perform engineering work for a company without being licensed.