| Inhouse Employer | Central | Hotel | SS | SS | Marsiling |
| Uniforce Security Services Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SS | Marsiling |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SS | SS | Sengkang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Sengkang |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Choa Chu Kang |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SS | Marsiling |
| Uniforce Security Services Pte Ltd | Central | Condominium | SS | SS | Marsiling |
| Certis Group | Island Wide | Commercial | SS | SS | Marsiling |
| Aigle Security Pte Ltd | North | Condominium | SS | SS | Marsiling |
| 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 |
| Peregrine Security Pte. Ltd. | South | Office Building | SS | SSS | Ang Mo Kio |
| 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 |
| 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 |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Sengkang |
| Soverus Pte Ltd | Island Wide | - | SS | SS | Hougang |
