/ About Us

For over 40 years, NSI has maintained a register of Approved Companies. These companies work to the highest industry standards demanded by the police, fire and rescue services and insurance industry.

Businesses and homeowners who choose NSI approved  companies have the reassurance that their contractors are regularly audited by NSI to the latest standards, and provide high quality security systems, fire safety solutions and guarding services.

Find NSI approved companies and the services for which they hold approval in our NSI Company Finder.

/ About us

• Who We Are
• Our Approach
• Our Culture and Vision
• Our People
• Our Accreditations and Memberships
• Why Choose an NSI Approved Company?
• Gold and Silver Explained
• Impartiality Statement
• Career Opportunities at NSI