At-risk persons include prominent political figures and influential persons whose ideas and activities may draw demonstrators or radicals capable of violence and disorderly behavior. The introductory section of the article advises that the skills necessary to design and execute protective services are those common to basic policing functions. When an at-risk person is scheduled to spend time on a campus without his/her own security detail, campus police will be responsible for all facets of protection. There must be advanced planning for a protective detail, a secure motorcade, the establishment of communications, the employment of protective intelligence procedures, and the creation of appropriate liaison links. When the at-risk campus visitor brings his/her own security detail, then campus police are responsible for advance planning with that security detail, as well as cooperation in the implementation of the security plan during the visit. This article presents and elaborates upon the basic principles of protection. These principles pertain to the establishment of defense perimeters that increasingly tighten near the exact location of the person being protected; the creation of security posts (checkpoints, surveillance posts, special mission posts, and identification systems); advance preparations for the visit; protective intelligence; and motorcades and the driving function. Other topics addressed are the goal of influencing percentages regarding security vulnerabilities, an appropriate mind set, the protective function in a free society, the psychology of deterrence, and deciding on publicized versus unpublicized security measures. 1 reference