Elite Security Group of South Jersey

Elite Security Group of South Jersey Since 1986, GCSI has been a family owned and operated business dedicated to providing quality services to homes and commercial establishments.

Since 1986, we’ve protected homes and businesses across New Jersey with advanced security systems, including alarms, surveillance, access control, and fire detection, delivering reliable 24/7 protection with personalized service. GCSI continues to exceed industry standards by providing certified, trained technicians, along with knowledgeable and courteous customer support staff. Our team is ready

to serve you at our newly expanded 4,200 square foot office located at 40 A Walnut Street in Williamstown, New Jersey. Products: Home Security Systems, Fire Detection Systems, Digital Surveillance Camera, Personal Emergency Respose Systems, Low Temperature Alarm Systems, High Water Level Alarm Systems, Central Station Monitoring, Burglar Alarms, Access Control, Instrumentation Monitoring Alarms, Port Surveillance Systems

We have a new name: GCSI Security Group is now Elite Security Group. Nothing about the company behind it changed same ow...
09/04/2026

We have a new name: GCSI Security Group is now Elite Security Group. Nothing about the company behind it changed same owner, same technicians, same phone number, same monitoring. Over the years the work grew from where we started into commercial access control, fire and life safety, and full video systems, and the old name stopped describing it. Thank you for being part of getting here. Decades of Success. Evolving for Tomorrow. Follow our new instagram account

A new name does not change what you can count on. Your monitoring, your service plan, and your account details stay exac...
09/02/2026

A new name does not change what you can count on. Your monitoring, your service plan, and your account details stay exactly the same. The same local team continues to support your property every day. If you have questions about the transition, reach out any time. We are here to help, now as Elite Security Group.

Introducing Elite Security Group. GCSI Security Group is now Elite Security Group, reflecting decades of trusted service...
09/01/2026

Introducing Elite Security Group. GCSI Security Group is now Elite Security Group, reflecting decades of trusted service and our continued growth across New York, New Jersey, and the DMV area. Your alarm monitoring, fire alarm systems, and access control service continue without interruption, under a name built for what comes next.

Soon.
09/01/2026

Soon.

Nearly complete.
09/01/2026

Nearly complete.

Almost there.
08/30/2026

Almost there.

A new look is coming together.
08/29/2026

A new look is coming together.

Same team. Same trust.
08/28/2026

Same team. Same trust.

Address

40 Walnut Street, # A
Williamstown, NJ
08094

Opening Hours

Monday 8am - 4:30pm
Tuesday 8am - 4:30pm
Wednesday 8am - 4:30pm
Thursday 8am - 4:30pm
Friday 8am - 4:30pm

Telephone

+18567288228

Website

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