Leading The Security Industry
Since 1983
YOUR SECURITY IS OUR TOP PRIORITY
We're a full-service security systems contractor
Alarm Computer Technology is a full-service security systems contractor. We specialize in state-of-the-art burglar alarm systems, fire alarms, CCTV systems, access control, and audio systems. Currently, we service several thousand residential and commercial customers all over New England, as well as in New York, New Jersey, and Pennsylvania. Helder Lemos, the founder, and the president created ACT in 1983. With almost 36 years of experience in the security industry, and using our extensive product knowledge, and customer-oriented approach, we will design a system that will meet all of your security needs, all while keeping it affordable.
We are a licensed systems contractor and a member of the National Burglar and Fire Alarm Association. In addition, we employ NBFAA-certified technicians. That way you can rest easy knowing that each system we design and install meets the industry’s highest standards for quality and craftsmanship.
However, what really separates us from our competitors is our responsiveness to our customers’ needs. Nearly two-thirds of our business coming from repeat clients. That is because we have created a winning customer service formula! As a result, it has made our customer base one of the most loyal in the security industry. High-quality products, cutting-edge technology, expert installation, and exceptional customer service, that is our mission and our pledge to each customer. Call ACT today for all of your security system needs!
Burglar Alarm Systems
Fire Alarm Systems
Video Surveillance Systems
Access Control Systems
35+ Years Experience In The Security IndUstry
Found and President Helder Lemos created ACT in 1983. We have nearly thirty six years of experience in the security industry. Our unmatched product knowledge and customer-oriented approach has earned us our trusted reputation.



One of the best
Residential & Commercial Security Systems
ACT provides everything you need to keep your home & business safe and secure.
Fully Licensed Systems Contractor
No matter what your alarm is, we support it.
National Burglar and Fire Alarm Association

CERTIFIED TECHNICIANS
Meeting All Of Your Security Needs
What really separates us from our competitors is our responsiveness to our customers’ needs. With nearly two-thirds of our business coming from repeat clients, we have created a winning customer service formula that has made our customer base one of the most loyal in the security industry. High quality products, cutting-edge technology, expert installation and exceptional customer service… that is our mission and our pledge to each and every customer.
High Quality Products
Cutting-Edge Technology
Expert Installation
Exceptional Customer Service
CLIENT TESTIMONIALS
