Hawthorne Security was established in 1961 as a security guard provider by Mr. Robert Duncan in Kingston, Ontario. The operation was sold in 1990 to Kingston resident Mr. Robin Brent. In 2012 it was acquired by Ms. Marilyn MacKinnon, president of Hire Rite Business Solutions. Prior to the acquisition Ms. MacKinnon had a 10-year management relationship with Hawthorne Security.

Hawthorne is registered with the Ministry of Community Safety and Correctional Services. All Hawthorne security guards are licensed with this ministry following a thorough police reference check to qualify each applicant. Additionally, all guards are trained in First Aid and Smart Serve where applicable.