A professional who guards government installations, materials, and documents against illegal acts, such as sabotage, riot, and espionage. Respnsibilities include:

• Patrols area on foot, horseback, automobile, or aircraft to detect and prevent unauthorized activities, using weapons or physical force as necessary.
• Searches installation for explosive devices and notifies bomb disposal unit.
• Stands guard during secret and hazardous experiments.
• Performs routine police duties within installation.
• May travel throughout United States and foreign countries.