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
G&J Customized Security Systems offers FREE ESTIMATES on our many low-voltage services, including....
serving all your low-voltage needs:
G&J Customized Security Systems LLC
CALL US TODAY   410-857-0342
security, video cameras, home theater, central vacuum, window candles, fire alarms, access control, intercom, network wiring...