Saturday 21 June 2025

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NSI certification provides reassurance to customers that a contractor/service provider is reputable and trustworthy and is continuing to work to the relevant industry standards. Their certificate of approval details these standards against which they are approved. 

NSI approval is only awarded and retained by those companies able to consistently meet our exacting standards. Standards are periodically updated to accommodate modern technology and working practices. Appointing an NSI approved company provides the peace of mind that your contractor is maintaining its competency in line with the latest practice.

NSI has provided certification services for over 40 years and is widely recognised by consumers, specifiers, police and insurers as the badge they can trust.

All NSI Approved Companies demonstrate they:

  • meet the technical requirements of the appropriate scheme(s)
  • meet all relevant British Standards
  • provide a high level of staff training and supervision to industry best practice standards
  • are comprehensively insured to protect customers and staff
  • are inspected regularly by NSI auditors to check technical competence with on-site visits and head office management administration

“We believe that NSI certification adds significant value to the way in which we do our business here at Alarmfast in Glasgow. We consider that we are Scotland’s experts at business and domestic security requirements and we know that our customers value the reassurance and confidence in our capabilities which comes with NSI approval.”
Paul Stewart, Operations Director Alarmfast Supervision Security Systems Ltd

“Mercury are extremely proud to part of the NSI community and we firmly believe that the effect of third party certification and recognition by a sector specific body like NSI ensures we have added value and the edge over our competitors as well as keeping our own standards of service delivery to its optimum at all times”.
Francis Cullen, MD, Mercury Security

“We chose NSI because we were told that NSI was the best for the industry and we wanted the best for our company”
Wendy Holloway, Office Manager, Select Security Solutions Ltd.