| Inhouse Employer | West | In-House | OM | Nil | Dover |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Yishun |
| Inhouse Employer | West | In-House | OM | SSS | Tampines |
| Inhouse Employer | West | In-House | OM | CSO | Toa Payoh |
| Elitez Security Pte Ltd | West | Commercial | SO | SS | Yishun |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Jurong East |
| Certis Group | West | School | SSO | SO | Outram Park |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | Admiralty |
| AETOS Holdings Pte Ltd | West | - | SO | SSO | Bukit Gombak |
| Inhouse Employer | West | In-House | OM | CSO | Bedok Reservoir |
| Inhouse Employer | West | In-House | OM | SS | Toa Payoh |
| Inhouse Employer | West | Industrial / Factory | SO | CSO | Boon Lay |
| Inhouse Employer | West | In-House | OM | SSS | Sengkang |
| Trek Investigations & Security Management Services Pte Ltd | West | Industrial / Factory | SO | Nil | Jurong East |
| Jasa Investigation & Security Services Pte Ltd | West | Industrial / Factory | SSO | SSO | - |
| Elid Technology International Pte Ltd | West | Condominium | SS | CSO | Bukit Panjang |
| Prospect Protection Pte Ltd | West | Industrial / Factory | SS | SS | - |
| Prospect Protection Pte Ltd | West | Construction | SS | SS | - |
| Global Ritz Protection (Security Services) Pte Ltd | West | Industrial / Factory | SS | SS | - |
| Inhouse Employer | West | Industrial / Factory | SO | SSO | Bukit Gombak |
| Triple ‘S’ Protection Pte Ltd | West | Depot | SSO | SSO | Tuas Link |
| Jasa Investigation & Security Services Pte Ltd | West | Industrial / Factory | SSO | SSO | Tuas Link |
| Peregrine Security Pte. Ltd. | West | Industrial / Factory | SSO | SSO | Tuas Link |
| ESA Security Pte Ltd | West | Industrial / Factory | SSO | SSO | Tuas Link |
| Triple ‘S’ Protection Pte Ltd | West | Depot | SSO | SSO | Tuas Link |
