Who We Are Westminster Security Co. / Alarm Company of Maryland is a Maryland based security provider specializing in the design, installation, service and monitoring of security and fire alarm systems. WSC / ACM has been serving our loyal customers, both residential and commercial, since 1974. In addition, WSC / ACM also provides its services to the surrounding areas of Pennsylvania (Better known as Alarm Company of Pennsylvania "A.C.O.P.") Delaware, Virginia, and the Washington D.C. area. WSC /ACM is one of the only GE Security Pro Dealers in Maryland. Our company is a proud user of General Electric Security Equipment, which offers only the finest security technologies available. We have been in business for over thirty five years. Our foundation was built with this mission in mind: 100% customer satisfaction. We attain this goal by providing the highest quality products and services at an affordable price backed with an excellent monitoring service and a friendly staff of security experts. WSC / ACM is a company of approximately twelve thousand monitored customers, who does its own monitoring at its own local central station. We are large enough to serve you every security need, but small enough to know each customer by name.