From After-School Job to $4 Million Business
What started in 1985 as a young immigrant installing alarm systems has grown into one of the Northeast's most trusted security integrators — serving clients from Boston to Virginia for over 40 years.
Our Story
G. Leff Security Systems was founded in 1985 in Cliffwood, New Jersey. What began as an after-school job installing alarm systems from a single truck has grown into a full-service security integration company with operations spanning from Boston to Virginia.
Over four decades, we've evolved alongside the technology — from the first analog CCTV systems to today's AI-powered surveillance networks, card access systems, and smart building automation. But our commitment to doing the job right has never changed.
Today, we are the largest Dormakaba distributor in the tristate area, with certified installers who have maintained continuous certification for over 16 years. We protect everything from single-family homes to 200+ unit apartment complexes across the Northeast corridor.
Company Timeline
What Sets Us Apart
16-Year Dormakaba Certification
Certified installers with over 16 years of continuous Dormakaba partnership
1-Year Warranty
Full 1-year warranty on all parts and labor for every installation
Emergency Services
After-hours and emergency service available when you need it most
Boston to Virginia
Serving clients across the entire Northeast corridor
Notable Clients
We're proud to work with some of the top property developers and management companies in the Northeast.