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Get to Know Shannahan’s Investigation & Security Limited

Shannahan’s Investigation & Security Limited has been serving Mount Pearl, St. John’s, and the surrounding areas since 1975. We’re a family owned company, ensuring your business, office, event, home, or other property are well protected with our professional security guards, investigative services, and more.


Our affiliated sister companies include the following:


Umbrella Security Services Inc.

Based in Mount Pearl, Umbrella Security Services Inc. offers homeowners and business owners protection with personalized alarms and monitoring. Umbrella Security Services provides 24/7 electronic monitoring and uses quality security equipment like Counterforce.


Spectrum Investigation & Security

From camera installations and surveillance to security for cruise ships, aerodromes, and more, Spectrum Investigation & Security has you covered. Spectrum serves areas throughout Newfoundland, providing alarm response services and 24-hour monitoring.

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