| Ranger Investigation & Security Services Pte Ltd | West | Construction | SO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Inhouse Employer | West | School | OE | SS | Jurong East |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | Lakeside |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Lakeside |
| Inhouse Employer | West | In-House | OM | CSO | Toa Payoh |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | SO | SSO | Woodlands |
| Inhouse Employer | West | In-House | OM | CSO | Pasir Ris |
| DP Quest Investigation Consultancy Pte Ltd | West | Condominium | SSO | SS | Boon Lay |
| Dragnet Smartech Security Pte Ltd | West | Commercial | SS | SSS | Queenstown |
| Inhouse Employer | West | In-House | OM | SSS | Sengkang |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Storm Protection Pte Ltd | West | Industrial / Factory | SS | SS | Joo Koon |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SSO | SO | Bukit Batok |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | CSO | Boon Lay |
| Inhouse Employer | West | In-House | OM | CSO | Marsiling |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | - |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | - |
| GATES PCM Integrated Services Pte Ltd | West | School | SO | SO | Punggol |
