Founded in 1963, Vinson Guard Service is one of the largest privately owned security organizations in the United States. It operates nearly 20 offices in the states of Alabama, Georgia, Louisiana, Mississippi, Tennessee and Texas. Vinson Guard Service provides investigative and consulting services in addition to guard services. It offers investigative services in the areas of surveillance, narcotics, missing person search, and background, domestic, criminal, undercover and workers compensation investigation. Vinson Guard Service also provides pre-employment and employee screening, drug testing and executive protection services. Its guard services include industrial, commercial and residential security and patrolling. Headquartered in New Orleans, Vinson Guard Service maintains a location in Knoxville, Tenn.