| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| SATS Ltd | Island Wide | - | OM | SSS | Tampines |
| Certis Group | North | - | SO | Nil | Marsiling |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | - |
| Soverus Pte Ltd | Island Wide | - | OE | SSS | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | - |
| Inhouse Employer | Island Wide | - | OE | SSS | Toa Payoh |
| Soverus Pte Ltd | Island Wide | - | SSS | SO | Choa Chu Kang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SO | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Certis Group | North | - | SO | Nil | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| SATS Ltd | Island Wide | - | OM | SSS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Boon Lay |
| SATS Ltd | Island Wide | - | OM | SSS | Yishun |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Yishun |
