S.D. Codified Laws § 47-11D-6

A corporation formed pursuant to this chapter may render professional services only through its officers, employees, and agents who are duly certified to render such professional services under the provisions of chapter 36-4A. However, this section may not be interpreted to include in the term employee, as used herein, clerks, secretaries, bookkeepers, technicians, and other assistants who are not considered by law to be rendering professional services to the public.