A security agent provided protection for an individual.
Miss Dexter was a security agent who worked for Mr Saxon. (TV: 42)
Shrynor was a security agent employed by Willem van der Heever to look over his estate. (AUDIO: The Revenant's Carnival)
Starl Stanmore was a pilot and a deep cover security agent for the Earthlink Federation. (PROSE: The Gods of the Underworld)