National Security Inspectorate

Established in 1971, the National Security Inspectorate (NSI) has been a leader in certifying security and fire safety providers for over five decades. As a UKAS-accredited, not-for-profit certification body, we specialise in auditing and certifying companies against international and British standards, ensuring technical competence, professionalism, and trustworthiness. Our rigorous approval process scrutinises directors, teams, and quality management systems, providing assurance to homeowners, businesses, and public sector organisations. With over 2,000 approved companies and 3,700 annual assessments, we maintain the highest standards in security guarding, fire safety systems, and electronic security installations.

Our NSI hallmark is the most recognised mark of approval in the industry, trusted by insurers, police, and fire services. We offer training, technical guidance, and stakeholder collaboration to advance sector standards. Our Gold and Silver approval schemes reflect compliance with ISO 9001 and NSI Codes of Practice, ensuring clients receive reliable, compliant services. We operate in the UK and Republic of Ireland, supporting both domestic and commercial clients. Our commitment to continuous improvement and transparency underpins our reputation as a respected authority in security and fire safety certification.