Excalibur Security Agency is a full-service security guard company and the West Coast headquarters for national security firm RW Briscoe and Associates. We are also a guard agency (see 'Agency' page), fully licensed and insured, and have over thirty-five years of security experience. Excalibur guarantees, in writing, complete satisfaction and unbeatable rates (see 'Why Us' page). Our clients range from Fortune 500 companies to small businesses (see 'Portfolio' page). Our retention rate is among the highest in the industry.