CIO Security Guarding london night watch 4

We work in accordance with the most demanding industry standards including ACS SIA under which CIO Security Limited has Approved Contractor Status (ACS) for the provision of Security Guarding.

We have developed a market-leading range of value for money security services & the ability to deliver the perfect solution for every client. At CIO Security, we understand that our success has been built around our ability to provide every client with the best possible service. As such, we are dedicated to continuous improvement and work proactively to deliver the highest professional standards.


Although voluntary, the Security Industry Authority’s Approved Contractor Scheme (SIA ACS) is highly regarded, and organisations are increasingly insisting on only employing the services of security providers that are registered contractors.

In order to be on the Approved Contractor Scheme, companies undergo rigorous audits ensuring that they meet the high standards set by the accrediting body. CIO Security currently holds SIA approved Contractor Scheme (ACS) status for the provision of Security Guarding.


CIO Security is one of London and the South East’s foremost security companies with BSI Standard Specifications of Common Management System Requirements as a Framework for Integration. This is essentially an umbrella accreditation that deals with all common areas of BS ISO 9001.

Any future ISO accreditations sought by CIO Security under these three standards are also covered BSI. Accreditation to BSI Standards demonstrates that a company has evolved from operating a Quality Management System (QMS) to an Integrated Management System (IMS) encompassing BS ISO 9001.

CIO Security holds SIA approved contractor status for the provision of Security Guarding.
CIO Security Ltd is registered in England and Wales
Registration Number: 4060172Registration Number: 4060172
Registered Office: 9 Dartmouth Road, London SE23
VAT Number: GB 820224282.

ISO 9001:2015 Quality Management System
ISO 14001:2015 Environmental Management System
ISO 45001:2018 Occupational Health and Safety Management System

Membership No.: 274371 Common Assessment Standard

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