Crown Security Charles Street, 2120 N Charles St, Baltimore, MD 21218, US

Guardian Protection Services, founded in 1950, is one of the largest privately owned companies in the United States that sells, installs and monitors security systems. It provides wiring and networking services for homes that are under construction. The company also offers intrusion detection, fire protection, closed-circuit TV monitoring, card access control and system integration services. It serves more than 2 million customers and employs over 1,000 individuals. Guardian Protection Services is owned and operated by Armstrong Group of Companies, which is a provider of telecommunications services and serves customers in more than five states. The company provides solutions for Internet, burglary and commercial protection, as well as 24-hour monitoring and personal emergency services. Headquartered in Pittsburgh, Guardian Protection Services maintains multiple offices throughout U.S.

M Luis Construction

Sectek Inc