| Star Security Services | Island Wide | - | OE | SSS | Tampines |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| SATS Ltd | East | - | OE | SS | Woodlands |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| TwinRock Global | Central | - | SO | CSO | Yishun |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Star Security Services | Island Wide | - | Security Mgt | SSS | Pasir Ris |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Hougang |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Hougang |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Hougang |
