| Inhouse Employer | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Prospect Protection Pte Ltd | West | Industrial / Factory | SO | Nil | - |
| Certis Group | West | Mix-Development | SO | SO | Bukit Gombak |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Construction | SO | SO | Bukit Gombak |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Elid Technology International Pte Ltd | West | Condominium | SO | SO | Bukit Gombak |
| Kingston Property Maintenance Services Pte Ltd | West | Condominium | SO | SO | Bukit Gombak |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Supreme Security Agency Pte. Ltd. | West | Industrial / Factory | SO | SO | Bukit Gombak |
| Focus Security Services Pte Ltd | West | Condominium | SS | SO | Bright Hill |
| Focus Security Services Pte Ltd | West | Condominium | SS | SO | Bright Hill |
| Focus Security Services Pte Ltd | West | Condominium | SS | SO | Bright Hill |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Lakeside |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| GoMobile Security Solutions Pte Ltd | West | Industrial / Factory | SSO | SO | Lakeside |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SSO | SO | Lakeside |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| AETOS Holdings Pte Ltd | West | - | SO | SSO | Boon Lay |
| Inhouse Employer | West | In-House | OM | SSS | Bishan |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Elid Technology International Pte Ltd | West | Condominium | SS | SS | Marsiling |
| Elid Technology International Pte Ltd | West | Condominium | SS | SO | Bukit Batok |
| Focus Security Services Pte Ltd | West | Condominium | SS | SS | - |
