| ProtectPlus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | School | SO | SO | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | South | School | SO | SO | Clementi |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Clementi |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Clementi |
| Inhouse Employer | Central | In-House | SSS | CSO | Clementi |
| SMS Investigation & Security Pte Ltd | Central | Condominium | SSO | CSO | Clementi |
| Labourtel Management Corporation Pte Ltd | East | Dormitory | CSO | CSO | Clementi |
| Soverus Pte Ltd | Central | Data Centre | SSS | CSO | Clementi |
| Soverus Pte Ltd | Central | Data Centre | SSS | CSO | Clementi |
| PICO Guards Pte Ltd | Central | Commercial | SSS | CSO | Clementi |
| Soverus Pte Ltd | Central | Data Centre | SSS | CSO | Clementi |
| Elitez Security Pte Ltd | Central | Commercial | SSS | CSO | Clementi |
| Securus Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Clementi |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Clementi |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Clementi |
| SATS Ltd | Island Wide | - | OM | SS | Clementi |
