| ONE°15 Marina Sentosa Cove, Singapore | South | In-House | OE | SS | Jurong East |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Jurong East |
| Security Masters Pte Ltd | Central | Data Centre | SS | SSS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| SATS Ltd | Island Wide | - | OM | SS | Toa Payoh |
| PICO Guards Pte Ltd | North | Data Centre | SSO | SSO | Ang Mo Kio |
| William Secure Solutions Pte Ltd | East | Condominium | SSS | CSO | Woodlands |
| TwinRock Global | Central | - | Security Mgt | Nil | Ang Mo Kio |
| Inhouse Employer | East | In-House | SO | SO | Pasir Ris |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Batok |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Yishun |
| Certis Group | North | - | SO | Nil | Marsiling |
| Bulls-Eye Security Services Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| SATS Ltd | Island Wide | - | OM | Nil | Tampines East |
| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Boon Lay |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SSS | Yishun |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Trek Investigations & Security Management Services Pte Ltd | Central | Condominium | SO | SO | Novena |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
| Inhouse Employer | Central | In-House | SO | SS | Woodlands |
| Inhouse Employer | West | Industrial / Factory | SO | SSS | Yishun |
