| Certis Group | Island Wide | - | SO | SO | Punggol |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Star Security Services | Island Wide | - | Security Mgt | SS | Hougang |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Acestes Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Acestes Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Securus Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | CSO | Hougang |
| SATS Ltd | Island Wide | - | Inves | Nil | Yishun |
| Acestes Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Yishun |
| SATS Ltd | Island Wide | - | Inves | Nil | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
