| Prosec Services Pte Ltd | Central | Commercial | SSO | SSO | - |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SSO | SSO | - |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Simei |
| SMS Security | East | Commercial | SSO | SS | Simei |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Woodlands |
| Inhouse Employer | South | Hotel | SSO | SSS | Potong Pasir |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | CSO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | - |
| Elid Technology International Pte Ltd | Central | Hotel | SSO | SSO | Redhill |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Buona Vista |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Pasir Ris |
| Ascentiaa Security Management Pte Ltd | East | Condominium | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | Mountbatten |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | Mountbatten |
| Inhouse Employer | South | In-House | SSO | SSS | MacPherson |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Jurong East |
| Certis Group | West | School | SSO | SO | Outram Park |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SSO | SO | Outram Park |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Tiong Bahru |
| Orchid Hotel Private Limited | Central | In-House | SSO | SSO | Bukit Gombak |
| Jasa Investigation & Security Services Pte Ltd | West | Industrial / Factory | SSO | SSO | - |
