Security ONE


Security ONE has been the premier security company in Southwestern Ontario for over 30 years. Locally owned and operated since 1978, the company has been led by a group of individuals with an extensive background in commercial and residential security.

We are a member of the Better Business Bureau, Canadian Alarm & Security Association (CANASA) and listed with Underwriters Laboratories Canada (ULC).


We offer 24-hour, 365-day a year monitoring of your home, office, or medical alert of a loved one. All of our monitoring is done locally, based out of our Leamington, Ontario monitoring station.

Security ONE is an authorized dealer for Honeywell and First Alert Security System. We provide our customers with complete solutions, and a full line of security products and services. We offer additional monitoring services such as low temperature, rising sump pump levels, asset protection, and protection from noxious gases.

You can count on us for all of your security needs, including the design, installation, servicing and monitoring of your Security ONE Alarm system.


Client Testimonials

“With over 100 employees coming and going at various times of the day, Security ONE suggested a door access control system that eliminated keys entirely. I now don’t have to worry about changing the locks or wondering if an employee showed up to work on time. From the initial design to the installation – everything has been top notch!”

– Abe Fehr – President of Uni-Fab

” Mark and the Security ONE team took the time to educate me about additional security measures I could put in place such as email notifications when an employee entered or exited my office building. I unfortunately had a case where an employee was not working the hours that they stated on their time sheet so this was a great tool in helping me to determine that. Thank you for always providing myself, family and staff with peace of mind.”

– Alynn Anglin – Anglin Financial Management

“Just wanted to let Security ONE know of the GREAT Service we received today at the Leamington Fairgrounds! Your service technician Steve Tavares was so patient teaching myself how to properly operate our alarm system. He was very knowledgable and thorough making sure we were properly secured in our building. Plus fixing any problems then and there! Thanks Steve for a job very well done!

– Tammy Wiper – President, Leamington District Agricultural Society

“I just wanted to write a short note of thanks to the entire team at Security ONE. Both my home and my businesses have been long term customers of Security ONE. Throughout this period, I have found their service and reliability to be absolutely impeccable during these years. “

– Frederick H. Herdman – President, Herdman Technology Ltd.


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