Access Control Systems

Save Money. Create audit trails & secure areas. Make changes with ease. From one door to large commercial projects. Read more ...

Video Surveillance Systems

Reduce theft and vandalism, as well as your own liability. Let us advise you on issues such as upgrading to IP/Megapixel. Read more ...

Locksmith Services

We handle large commercial projects such as fit-ups and new construction, as well as residential re-keys and lock changes. Read more ...

Burglar & Fire Alarm Systems

Secure your home or business with complete burglar and fire alarm monitoring systems, including environmental monitoring. Read more ... 

At One Source Security, we don't require your home or business to fit our systems. We build a system to fit your situation. Using state of the art equipment, we custom design a security system to meet your needs.

Paul T

One Source was awarded the Bid to upgrade our existing access control and video systems. The organization was professional and courteous through the whole experience. Any questions that came up during the process were answered completely and thoroughly to include prompt response to any minor issues that came up through the transition."


Paul T.
Merrimack Police Department

What our Customers have to say

Merrimack Chamber of Commerce
Associated Locksmith of America
New Hampshire Alarm Association
Massachusetts Systems Contractors Association
 American Society for Industrial Security National Fire Protection Association
 Souhegan Valley Chamber of Commerce

Expert Security Systems integration for New England

There's little difference in the actual equipment from one security system to the next.  What truly distinguishes a security system is how it's designed... how it's implemented... and how it's serviced.

One Source Security 

Our Address: 674 Daniel Webster Highway
                        Merrimack, NH 03054

Hours of Operation:
                        Mon. to Fri. 8am to 5pm

Contact us:      800.570.6478