P & W Fire Safety, 334 Covington Rd, San Antonio, TX 78220, US

Founded in 1950, Guardian Protection Services is one of the world's largest privately held security company. It sells, installs and monitors residential and commercial security systems. The company has more than 200,000 customers with more than 1,000 full-time employees. It provides security systems for existing and newly constructed homes. Guardian Protection Services is also one of the 68 central stations to earn Central Station Alarm Association (CSAA) Five Diamond 100 percent operator certification. The company is one of the Armstrong Group of Companies, which is a provider of telecommunications services. Guardian Protection Services offers 24-hour central monitoring station that adheres to the standards of Underwriters Laboratories Inc.