| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| IGC Security Services Pte Ltd | South | Commercial | SS | SS | Marsiling |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Marsiling |
| Soverus Pte Ltd | South | Commercial | SS | SS | Marsiling |
| Singapore Security Force Pte Ltd | Central | Mix-Development | SSO | SS | Aljunied |
| York Hotel (Private) Limited | Central | In-House | OM | SS | Yishun |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SS | Jurong East |
| Soverus Pte Ltd | South | In-House | SS | SS | Jurong East |
| William Secure Solutions Pte Ltd | Central | Condominium | SS | SS | Serangoon |
| Soverus Pte Ltd | South | In-House | SS | SS | Jurong East |
| Inhouse Employer | West | In-House | OM | SS | Sengkang |
| PICO Guards Pte Ltd | Island Wide | - | OM | SS | Pioneer |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Pioneer |
| SATS Ltd | Island Wide | - | OM | SS | Pioneer |
| SMS Investigation & Security Pte Ltd | South | Condominium | SS | SS | Marsiling |
| Certis Group | West | Depot | SS | SS | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Marsiling |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SS | Bedok |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Bedok |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SS | SS | Hougang |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Yishun |
| TwinRock Global | Central | - | Security Mgt | SS | Tampines |
