Shannahan's Investigation & Security Ltd.

Shannahan's Investigation & Security Ltd. is a private investigation agency based in St. John's, Newfoundland and Labrador, in Canada. In its own published description, the company presents itself as Atlantic Canada's premier investigation and security company, located in St. John's.

The firm's published services include investigative, surveillance, enforcement and security services for individuals and for private and public sector clients.

Its practice is aimed at clients who need discreet field work and clearly documented findings before they act.