SITO - Security Industry Training Organisation
BSIA - British Security Industry Association
ASIS - ASIS International is the foremost organization advancing the security profession worldwide.

Security Industry Regulation
The Security Industry Authority
the authority responsible for regulating and licensing the private security industry in England & Wales

Security organisations
CoESS (Confederation of European Security Services)
Euralarm (Confederation of European fire and security associations)
NAID (National Association for Information Destruction (US))
NSI (The National Security Inspectorate)
SSAIB (Security Systems & Alarms Inspection Board)
AUSCO (Association of University Chief Security Officers)

Related organisations
Arson Prevention Bureau
Association of British Insurers
Association of Chief Police Officers
Banknote Watch
British Bankers' Association
British Fire Protection Systems Association (British Approvals for Fire Equipment)
British Retail Consortium
British Standards Institution
Building Societies Association
Building Research Establishment (inc. LPCB)
Crime Concern
Crimestoppers
Criminal Records Bureau
Data Protection Office
Department of Trade and Industry
Fire Protection Association
Health & Safety Executive
Health & Safety Executive (Publications)
Home Office Research Development
Information Commissioner
Raid Control
Scarman Centre
Security Hotel United Kingdom
United Kingdom Accreditation Service