serving all your low-voltage needs....
Customized Security Systems LLC
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G&J Customized Security Systems was established in 1992.  We proudly serve the Northern Maryland and Southern Pennsylvania areas, specializing in residential and commercial low-voltage needs. 
G&J Customized Security Systems consistently delivers unsurpassed value to our customers by not only selling low-voltage products but also installing them personally.  We serve as the owners, sales, installation and service team and we are proud to serve you. 
Residential and Commercial Professionals
The G&J Difference
Our Services
CALL US TODAY   410-857-0342
G&J Customized Security Systems offers FREE ESTIMATES on our many low-voltage services, including....