Company History

In 1959 Doug’s father started the FIRST electronic security company in Eastern Canada in the historic Byward Market in downtown Ottawa. When Doug’s father passed away in 1982, Universal Alarms was one of the largest independent security companies in the country. Previous to his passing, Doug’s father founded the Canadian Alarm and Security Association ( CANASA ). Bob Henderson felt the electronic security industry need a national voice to speak on behalf of security companies of all sizes and areas of expertise and today CANASA is the main voice of our industry, boasting over 5,000 active members across Canada.

Newspaper 1980

An image from 1980 showing Doug’s brother Frank in the monitoring station of Universal Alarms located in the Byward Market. Back then, monitored customers required a manual response from the monitoring station before exiting their home/business, and the integrity of the station was maintained in a more rudimentary way.

Today, Doug Henderson takes his fathers visions into the future, with the introduction of NEXGEN by Henderson Security, we are taking our humble beginnings from 1959, into to unbelievable leaps and bounds in new technology such as controlling home automation features from anywhere in the world from an I-phone or laptop. Features such as Pet Tracking, Child Tracking, remote control of interactive devices such as door locks, lighting, thermostats, cameras and the list goes on and on.

Our vision for the future is simple, to help protect everything you care about completely and professionally.


I have moved several times over the past 8+ years and continued renewing contracts with Henderson for security equipment and services. I recently moved, and as always dealt directly with Mark Wilson, who has always treated me in a professionally and friendly manner. On the day of my most recent installation, I was running very late. I asked Henderson if they could keep this appointment, which they did. The technician, Adam, arrived past his typical quitting time and stayed until after 8PM to complete the installation. I cannot say enough about my business relationship with Henderson. As always, a job well done.