A security guard is a person who is hired to protect a variety of tangible assets that include people, goods, and money. That person works within governmental regulations to prevent things like theft of goods, unsafe worksite behaviours, and vandalism. His or her uniformed presence is often enough to deter issues.
Depending on their specialty, security guards work with service dogs, electronic surveillance systems, and police officers to protect assets. You will find them guarding government buildings that house state secrets and patrolling warehouses that contain high-end electronics.
Some security guards are most effective at their jobs when in plain clothes. Protecting a high-profile corporate CEO or head of state often requires a security team that can blend in with a crowd of onlookers. These guards must be ready to detect, deter, and diffuse dangerous situations according to predetermined guidelines.