NSI - Certification for security and fire protection companies

Find an NSI Approved Company

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All NSI

NSI Gold

NSI Silver

NSI CerticCS

SIA ACS

NSI Gold: NSI approved companies compliant with NSI’s Gold Approval Criteria, NSI’s Regulations, NSI’s Quality Schedule, the ISO 9001 Quality Management System standard and defined technical standards.

NSI Silver: NSI approved companies compliant with NSI’s Silver Approval Criteria, NSI’s Regulations and defined technical standards.

CerticCS: NSI approved companies in the Republic of Ireland compliant with specific PSA standards and/or the ISO 9001 Quality Management System standard.

SIA ACS: Security Industry Authority Approved Contractors assessed by NSI.

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Service Options

All Services

Security Systems

Fire Safety Services

Guarding Services

CerticCS

SIA ACS

Specialist Services

Alarm Monitoring

Companies listed operate across the UK regardless of location. You will obtain a list of all NSI approved companies providing these services (locational search is not applicable).

Companies listed hold an NSI CerticCS approval in either the UK or the Republic of Ireland. Note: You will obtain a list of all CerticCS approved companies (locational search is not applicable)

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Company Name

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Avon and Somerset Constabulary

Bedfordshire Police

Cambridgeshire Constabulary

Cheshire Constabulary

City Of London Police

Cleveland Police

Cumbria Constabulary

Derbyshire Constabulary

Devon & Cornwall Police

Dorset Police

Durham Constabulary

Essex Police

Gloucestershire Constabulary

Greater Manchester Police

Hampshire Constabulary

Hertfordshire Constabulary

Humberside Police

Kent Police

Lancashire Constabulary

Leicestershire Police

Lincolnshire Police

Merseyside Police

Metropolitan Police

Norfolk Constabulary

Northamptonshire Police

Northumbria Police

North Yorkshire Police

Nottinghamshire Police

South Yorkshire Police

Staffordshire Police

Suffolk Constabulary

Surrey Police

Sussex Police

Thames Valley Police

Warwickshire Police

West Mercia Police

West Midlands Police

West Yorkshire Police

Wiltshire Police

Dyfed Powys Police

Gwent Police

North Wales Police

South Wales Police

Police Service Of Northern Ireland

Guernsey Police

States Of Jersey Police

Isle Of Man Constabulary

No Police Response

An Garda Síochána

Police Scotland

By selecting a region the results shown represent the areas of operation of an approved company, which may differ from the company location

By selecting a Police region you will return companies offering Police Response only

NSI Gold and Silver Medals - Signifying a companies approval with NSI

Look out for the NSI hallmark

It’s the most widely recognised mark of approval in security and
fire safety. NSI approval tells you the company is:

Technically Competent

Working to International and British Standards and NSI Codes of Practice, teams have relevant technical experience

Professional

Gold approval - operating a Quality Management System to ISO 9001 and NSI Quality Schedules

Trusted

Reputable Directors & leaders with relevant business experience and effective employee security screening

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Young family returning to a safe and secure home

Home security and fire safety you can trust

As a householder you want to be sure your security and fire safety providers are trustworthy with the knowledge to translate your needs into a solution that is right for you.

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Protecting the workplace

Security and fire safety in your workplace are of the utmost importance. NSI approved companies ensure peace of mind whether installing a fire or intruder alarm, CCTV system, servicing your fire extinguisher or providing door supervision.

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NSI approved companies

Approved companies keep up to date with the latest developments in standards and codes of practice for the benefit of their customers.

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Looking for NSI approval?

Independent, regular assessment by NSI's expert team of auditors demonstrates your company is compliant with British and International Standards and relevant Codes of Practice, providing reassurance for your clients.

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