| Securus Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Crowne Plaza Changi Airport | East | In-House | OM | SSO | Clementi |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Inhouse Employer | East | School | SO | SSO | Woodlands |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SSO | Boon Lay |
| Guthrie FMC Security Pte Ltd | West | Dormitory | SO | SSO | Choa Chu Kang |
| Elid Technology International Pte Ltd | West | Condominium | SO | SSO | Choa Chu Kang |
| First Security & Private Investigation (Singapore) Pte Ltd | West | Condominium | SSO | SSO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| Elid Technology International Pte Ltd | West | Condominium | SO | SSO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| Bulls-Eye Security Services Pte Ltd | Island Wide | - | SSO | SSO | Pasir Ris |
| Dragnet Smartech Security Pte Ltd | Central | School | SSO | SSO | Pasir Ris |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Buona Vista |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| Prosegur Singapore Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
