| TwinRock Global | Central | - | Security Mgt | SS | Tampines |
| TwinRock Global | Central | - | Security Mgt | SSS | Dover |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Dover |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Sengkang |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Dragnet Smartech Security Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Eagle I Security Services Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Sengkang |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| TwinRock Global | Central | - | OE | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
