SIA Approved Contractor Scheme: the credential that wins institutional contracts
SIA Approved Contractor Scheme accreditation is the baseline requirement for most commercial security contracts in London — facilities managers at large estates, NHS trusts, local authorities and major retail chains typically will not engage a guarding company that does not hold ACS status, regardless of price. Your ACS number, the accreditation badge and the specific scope of your approval — manned guarding, door supervision, keyholding, CCTV operation — should be displayed prominently on your homepage and about page, not relegated to a certifications section that a visitor might never reach. Procurement teams and facilities managers who must demonstrate to their own management that they used a compliant supplier will look for this credential specifically, and its absence on your website will eliminate you from consideration before any conversation takes place. Including a brief explanation of what ACS accreditation requires — NSI or SSAIB audit, officer vetting standards, management systems, ongoing compliance monitoring — communicates to buyers who may not know the standard that it represents genuine quality assurance rather than a self-certified claim.