Del. Code tit. 8 § 607
No professional corporation may render professional services except through its officers, employees and agents who are duly licensed or otherwise legally authorized to render such professional services within this State; provided, however, this provision shall not be interpreted to include in the term "employee" as used in this chapter, clerks, secretaries, nurses, administrators, bookkeepers, technicians and other assistants who are not usually and ordinarily considered by law, custom and practice to be rendering professional services to the public for which a license, or other legal authorization, is required in connection with the profession to be practiced, nor does the term "employee" include any other person who performs all of such person's employment under the direct supervision and control of an officer, employee or agent who renders professional service to the public on behalf of the professional corporation; provided that, no person shall, under the guise of employment, practice a profession unless duly licensed to practice that profession under the laws of this State. Notwithstanding any other or contrary provisions of the laws of this State, a professional corporation may charge for the services of its officers, employees and agents, may collect such charges, and may compensate those who render such professional services.
8 Del. C. § 607