| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SSO | SSO | Tanjong Pagar |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | CSO | SSS | Woodlands |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Prosec Services Pte Ltd | Central | Commercial | SO | SO | Bukit Batok |
| A-SAT Pte Ltd | North | Commercial | SSO | SO | Bukit Batok |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SSO | SO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SSO | SO | Bukit Batok |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSS | Punggol |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Lakeside |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Toa Payoh |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Hougang |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SS | SS | Hougang |
| Soverus Pte Ltd | South | Commercial | SS | SS | Hougang |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| Force-One Security | Central | Commercial | SO | SO | Bukit Batok |
| GWC Commercial Pte. Ltd. | Central | Commercial | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| PICO Guards Pte Ltd | Central | Commercial | SSS | SSS | Tanjong Pagar |
