| Star Security Services | Island Wide | - | Security Mgt | SS | Ang Mo Kio |
| Securus Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | South | - | OE | SSO | Simei |
| Star Security Services | Island Wide | - | Security Mgt | SS | Ang Mo Kio |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Choa Chu Kang |
| SATS Ltd | Island Wide | - | OM | Nil | Commonwealth |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Commonwealth |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | Nil | Commonwealth |
| Certis Group | Island Wide | - | SO | SO | Yishun |
| SATS Ltd | Island Wide | - | Inves | SSO | Boon Lay |
| Securus Pte Ltd | Island Wide | - | OM | SO | Bedok |
| Certis Group | East | - | SO | SSO | Simei |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Strive Security Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Sembawang |
| Certis Group | East | - | SO | SO | Pasir Ris |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Yew Tee |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Yew Tee |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Yew Tee |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Yew Tee |
| Certis Group | Island Wide | - | SO | SO | Bedok |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Yishun |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SS | Yishun |
| SATS Ltd | Island Wide | - | OM | SS | Yishun |
| PICO Guards Pte Ltd | Island Wide | - | OE | SS | Yishun |
