| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | West | In-House | OM | Nil | Pioneer |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Jasa Investigation & Security Services Pte Ltd | West | Industrial / Factory | SSO | SO | Boon Lay |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Woodlands |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SS | Bukit Panjang |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SO | Ang Mo Kio |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Dover |
| Star Security Services | Island Wide | - | Security Mgt | SSO | Hougang |
| RAS Security Pte Ltd | North | Commercial | SSO | Nil | Bukit Batok |
| William Secure Solutions Pte Ltd | West | Industrial / Factory | SSO | SO | Boon Lay |
| SATS Ltd | Island Wide | - | OM | SSS | Tampines |
| TwinRock Global | Central | - | Security Mgt | SSS | Jurong East |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | SSS | Tampines |
| Fervour Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| Soverus Pte Ltd | Central | Commercial | SSS | CSO | Clementi |
| Premier Security Co-operative Ltd | North | Commercial | SSO | SS | Yishun |
| Metropolis Security Systems Pte Ltd | East | Condominium | SO | SO | Sengkang |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Certis Group | East | - | SO | SO | Pasir Ris |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SS | CSO | Yishun |
| Acestes Pte Ltd | Island Wide | - | OM | SO | Tampines East |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
