Office Locations Windsor 363 Eugenie St E Windsor, ON N8X 2Y2 Phone 519-25-ALARM See on Map Email This Location London 747 Hyde Park, Suite 100, London, ON N6H 3S3 Phone 519-434-5050 See on Map Email This Location Chatham 235 St.Clair St Chatham, ON N7L 3J8 Phone 519-352-6698 See on Map Email This Location Leamington 200 Sherk St Leamington, ON N8H 0A8 Phone 519-326-2020 See on Map Email This Location Email Us: London Office Contact Information What Do You Want To Say? Sign-up for our newsletter We don’t share your information. Connect with Security ONE online. Stay up-to-date on the latest trends in home and business security, community events and special offers. Jul30 Catalytic Converter Theft – How to protect your fleet from the increasing theft in our area. July 30, 2021 Read More Tweets by SecOneAlarm Friends made. Like us on Facebook to stay up-to-date on our latest contests, promotions & giveaways!