| Securus Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Simei |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Pioneer |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SS | Pioneer |
| Straits Retail Property Management Services Pte. Ltd. | Central | In-House | SO | SS | Pioneer |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Woodlands |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| SATS Ltd | East | - | OE | SS | Woodlands |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | SS | Pioneer |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
