Allied Universal

Guardsmark is one of the largest security service companies in the United States. It operates more than 155 offices throughout the U.S., Canada, Puerto Rico, United Kingdom, France and Singapore. Guardsmark is an ISO 9001:2000-certified company that provides emergency, permanent guarding, disaster response, control room monitoring, armed and special event security and patrolling services. Additionally, it offers background investigation, pre-employment and employee screening, executive protection, consulting, facility design and surveillance services. Guardsmark also assists clients in detecting and preventing computer fraud and curtail any resulting losses. It publishes books, reports and a variety of online information resources. Headquartered in New York City, Guardsmark has approximately 19,000 employees. It maintains a location in Kansas City, Mo.