| ProtectPlus Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| Peregrine Security Pte. Ltd. | Central | - | SSO | CSO | Bedok |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | CSO | Bedok |
| TwinRock Global | Central | - | SO | CSO | Bedok |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| SATS Ltd | Island Wide | - | Inves | CSO | Marsiling |
| Acestes Pte Ltd | Central | - | Security Mgt | CSO | Marsiling |
| TwinRock Global | Central | - | Security Mgt | CSO | Marsiling |
| Inhouse Employer | Central | Mix-Development | Security Mgt | CSO | Marsiling |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Marsiling |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | - | OM | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OM | CSO | Marsiling |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | CSO | Marsiling |
