About Our Security Systems Company

About Us

One Source Security and Automation, Inc. was founded in 1994 by its current owners, who have led the company with a commitment to providing personalized, and expert security solutions. Headquartered in Merrimack, NH, we specialize in commercial and residential security systems, access control, video surveillance, locksmith services, and more. Our local team of highly-skilled technicians and salespeople are trained and screened by us, ensuring that your security needs are met with care and expertise—without the use of sub-contractors.

In 2024, One Source Security became part of the Davis-Ulmer Family of Companies, joining forces with one of the leading life safety service providers in the Eastern United States. Davis-Ulmer, which operates under the umbrella of APi Group, Inc, brings unparalleled resources, experience, and support to our operations, including access to over 30 NICET-certified technicians to deliver high-quality, efficient, and cost-effective solutions.

We assess security risks and design custom solutions to keep your home or business safe, offering 24/7 support and personalized service for peace of mind.