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Who is NSI?

NSI stands for the National Security Inspectorate. They are widely recognised as the leading certification body for the security sector within the UK.

For over 40 years, NSI’s ambition is to not only raise standards, but also provides businesses reassurance and peace of mind, that companies who are NSI approved are maintaining competency in line with the latest practices.

NSI provides third-party certification to security companies that meet and can evidence the high regulatory standards to NSI industry standards. Furthermore, being approved by the NSI demonstrates that a company’s products, systems and services can be trusted by consumers.

What does NSI Gold mean?

NSI operates a 2 tier approach to approvals, Silver and Gold. NSI Gold being the highest accreditation.

NSI Gold approval signifies that in addition to compliance with industry-specific Standards, a company operates a Quality Management System and is compliant with ISO 9001. Furthermore, means an NSI Gold approved company goes that extra mile to ensure their service complies with highest industry standards. NSI Gold approved companies are regularly audited to ensure retention of their certification.

Why should I use an NSI Gold approved company?  

There are lots of benefits of using an NSI Gold accredited company, such as:


  • Technically Competent & Experienced – working to relevant standards and NSI codes of practice, with managers having relevant technical and engineering experience
  • Professional – NSI Gold approval operating a Quality Management System to ISO 9001
  • Trusted  – all staff are vetted, including engineers, reassuring you that whoever comes to your business has been security screened
  • Reputable – regularly inspected by NSI auditors to check technical competence with on-site visits and head office management administration
If you’re looking for a security company that will offer a genuinely exceptional service, one of the first things you know you should look out for in your research is accreditations and certifications from professional organisations. In the security industry, the NSI Gold standard is one of the best measures of quality and professionalism. 
For any queries, don’t hesitate to get in touch on 0800 083 0131 or email