Md. Code, Business Occupations and Professions § 14–303

(a) Subject to this section, the following individuals may practice engineering without a license:

(1) an employee or other subordinate of a professional engineer; and

(2) an employee of an individual who is not licensed but is otherwise authorized under this title to practice engineering without supervision.

(b) The authority to practice engineering under this section applies only while the employee or other subordinate works under the responsible charge of the licensee or other authorized individual.