A comprehensive list of Cambridge, MA based companies offering installation, maintenance and repair of home and business security systems, CCTV & burglar alarms and video surveillance services. 
At SimpliSafe Alarm Systems we provide wireless, cellular, DIY security systems across the US.
Richard M. — This system just works. Zero complaints.
24/7 Uniformed security guard company providing security services in the greater Boston and Metro area. Serving as a security provider to local Colleges and Universities, Executive Office Parks, large residential communities, Hi-tech Industries, Government and Military installations, Construction sites, and Special Events coverage, our extensively trained security personnel exceed the practices of