La. Stat. tit. 37 § 681
In order to safeguard life, health, and property and to promote the public welfare, any individual in either public or private capacity, or foreign or domestic firm, practicing or offering to practice professional engineering or professional land surveying, shall be required to submit evidence that he is qualified to so practice and shall be licensed as hereinafter provided. It shall be unlawful for any person to practice or to offer to practice in this state engineering or land surveying, as defined in this Chapter, or to use in connection with his name or otherwise assume, use, or advertise any title or description tending to convey the impression that he is a professional engineer or a professional land surveyor, unless such person has been duly licensed under the provisions of this Chapter.
La. R.S. § 37:681