Saint John is New Brunswick’s industrial and port city — home to Canada’s largest oil refinery and a major deep-water port. The executives and senior leaders who operate here require personal security that is professional, unobtrusive, and built around the realities of an industrial and energy-sector economy.
Executive Protection Services in Saint John
Saint John’s Personal Security Professionals
Elite Protection Built For
Saint John’s Port & Energy Sector
Cornerstone Security provides elite executive protection to Saint John’s most high-profile individuals — from uptown corporate offices to industrial and port facilities across the city. Every engagement begins with a genuine understanding of your risk environment, your schedule, and what level of presence is appropriate.
- Close Protection
- Secured Driving
- Advance Work
- Residential Security
- Concierge Security
- Event Security


Who We Protect In Saint John
Our clients include executives in the energy and refining sector, port and logistics leadership, and business owners and public figures across Saint John’s historic uptown core.
Whether the need is a single-day personal security detail or an ongoing protection programme, Cornerstone builds every plan around your actual exposure — not an off-the-shelf package.
“Every engagement begins with a genuine understanding of your risk environment. Nothing is templated.”
Meet Justice Osei,
Founder & CEO of Cornerstone
Justice Osei founded Cornerstone Security & Transport to bring a higher standard of planning, professionalism, and accountability to the security industry.
A protective-services professional with experience in executive protection, crisis management, and active threat response, Justice has worked in complex environments protecting elected officials, senior leadership, and high-profile individuals across the Metro Vancouver region.
He is Canada’s first certified ALIVE Active Threat instructor, trained in celebrity protection through ICON Global, and trained in crisis intervention and de-escalation.





“I contacted Cornerstone Security after an outstanding recommendation from a colleague who had previously used their close protection services. Justice and Paul handled an unexpected ‘sensitive’ situation with tact and grace. This experience elevated my understanding of the security industry in Vancouver. Respectfully, this is not your average night watchperson patrol company — if you require a professionally-dressed elite team that you would expect in a large global city, Cornerstone is the licensed and fully insured option.”
“Since Cornerstone Security started working in our building, the service became impeccable!! Concierges are dressed very well, their work ethic is great and they always are nice to our dogs!”
“Cornerstone is really reliable and really professional. We hired them for a private university event the day before the event because the original company failed to provide required documents. They provided all the paperwork super fast at an affordable price. On the day, the security guards were very responsible and helpful. If you’re looking for a security company, Cornerstone is the best one. 10/10 recommend.”
“Managing a complex site comes with its challenges. Cornerstone Security has been by our side along the way with all hands on deck. They are knowledgeable, reliable, responsive and get the task done. Simply awesome and a pleasure to work with. Thank you Justice and team for all your hard work.”
“Great company — we hired them for our dealership for patrol. We have noticed a lot of improvement: no unwanted trespassers in our premises after hours and they responded to emergencies within 30 minutes. We are happy with our choice and highly recommend Cornerstone to anyone in need of security.”
Security Services Across New Brunswick
Cornerstone deploys executive protection and personal security teams across Saint John and the surrounding New Brunswick region, with inter-provincial travel escort details across Atlantic Canada.
Common Questions
Ready To Discuss Your Saint John
Security Needs?
Speak with our team confidentially. We’ll ask the right questions, understand your situation, and outline an approach that fits.
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