| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Sengkang |
| Peregrine Security Pte. Ltd. | Central | Commercial | SS | SSS | Woodlands |
| Resorts World Sentosa | South | Commercial | SS | SSS | Dover |
| Metropolis Security Systems Pte Ltd | East | Condominium | SS | SSS | Tampines |
| Peregrine Security Pte. Ltd. | Central | Commercial | SS | SSS | Woodlands |
| Certis Group | Central | School | SS | SS | Marsiling |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | CSO | Toa Payoh |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Condominium | SS | SSS | Jurong East |
| Peregrine Security Pte. Ltd. | Central | Commercial | SS | SSS | Woodlands |
| Security Masters Pte Ltd | Island Wide | - | SS | SSS | Woodlands |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Lakeside |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Lakeside |
| Premier Security Co-operative Ltd | South | Commercial | SS | SSS | Tanjong Pagar |
| Force-One Security | North | Data Centre | SS | SS | Woodlands South |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SS | SS | Yishun |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SS | Yishun |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Yishun |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Yishun |
| PICO Guards Pte Ltd | North | Industrial / Factory | SS | SS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Yishun |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Yishun |
| Security Masters Pte Ltd | Central | Data Centre | SS | SS | Yishun |
| RAS Security Pte Ltd | East | Commercial | SS | SS | Yishun |
| William Secure Solutions Pte Ltd | South | Commercial | SS | SS | Yishun |
| Force-One Security | North | Data Centre | SS | SS | Yishun |
