| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| SATS Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| SATS Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Metropolis Security Systems Pte Ltd | North | - | SO | SSO | Sembawang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Yishun |
| SATS Ltd | Island Wide | - | OM | SSS | Yishun |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Chinatown |
| Eagle I Security Services Pte Ltd | Island Wide | - | SS | SS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| AETOS Holdings Pte Ltd | West | - | SO | SS | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| Premier Security Co-operative Ltd | Island Wide | - | SSO | SO | Woodlands |
| Certis Group | Island Wide | - | SSO | SO | Woodlands |
| Prosegur Singapore Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
