Which individual represents persons before administrative agencies without attorney supervision?

The correct choice is the legal technician, as this role is specifically designed to allow individuals to represent clients before administrative agencies without the need for an attorney's supervision. Legal technicians possess specialized training and knowledge that enables them to handle particular legal matters, especially in administrative contexts, independently.

In contrast, paralegals typically work under the supervision of an attorney and are not authorized to represent persons on their own before administrative agencies. Lawyers have the required legal credentials to represent clients in a court or before administrative bodies, but they must go through the formal educational path of law school and licensing, distinguishing them from legal technicians. Support staff generally assist in administrative tasks and do not engage in representing clients in any legal capacity.

Thus, the role of legal technician stands out as the appropriate choice for representation before administrative agencies independently.