| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SO | Tampines East |
| Ademco Security Pte Ltd | West | Mix-Development | SO | SO | Choa Chu Kang |
| Inhouse Employer | West | Commercial | SO | SS | Bukit Panjang |
| Inhouse Employer | West | School | SO | SO | Bukit Panjang |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SS | Punggol |
| Strive Security Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SO | SO | Boon Lay |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SO | SO | Boon Lay |
| TwinRock Global | West | Industrial / Factory | SO | SO | Boon Lay |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Construction | SO | SO | - |
| Ashtree International Pte. Ltd. | West | Dormitory | SO | SS | Marsiling |
| Ashtree International Pte. Ltd. | West | Dormitory | SO | SS | Marsiling |
| Soverus Pte Ltd | West | Industrial / Factory | SO | SSS | Jurong East |
| TwinRock Global | West | Condominium | SSO | SSS | Jurong East |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSO | Choa Chu Kang |
| AGS Integration Pte. Ltd. | West | In-House | SS | Nil | Yew Tee |
| William Secure Solutions Pte Ltd | West | Condominium | SO | SSO | Woodlands |
| Inhouse Employer | West | School | OE | SSS | Marsiling |
| Regal Security & Fire Management Services Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| Regal Security & Fire Management Services Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| Elitez Security Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| Chang & Chang Security Management Pte. Ltd. | West | Condominium | SO | SO | Choa Chu Kang |
| Ademco Security Pte Ltd | West | Mix-Development | SO | SO | Choa Chu Kang |
| Chang & Chang Security Management Pte. Ltd. | West | Condominium | SO | SO | Choa Chu Kang |
| Metropolis Security Systems Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
