| PICO Guards Pte Ltd | North | Industrial / Factory | SS | SS | Bukit Panjang |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SS | SS | Hougang |
| PICO Guards Pte Ltd | North | Industrial / Factory | SSO | SS | Woodlands |
| Peregrine Security Pte. Ltd. | North | Industrial / Factory | SSO | SS | Woodlands |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SO | SO | Kaki Bukit |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SSO | SSO | Toa Payoh |
| Hawkeye Security Solutions Pte Ltd | West | Industrial / Factory | SS | SS | Bukit Panjang |
| IGC Security Services Pte Ltd | South | Industrial / Factory | SSO | SS | Tiong Bahru |
| Eagle I Security Services Pte Ltd | East | Industrial / Factory | SO | SO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Pioneer |
| Royal Security Management Services Pte Ltd | North | Industrial / Factory | SO | SSO | Woodlands |
| SMS Security | Central | Industrial / Factory | SO | SSO | Tanjong Pagar |
| Soverus Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SS | Marsiling |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Simei |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Yishun |
| SMS Security | Central | Industrial / Factory | SO | SSO | Tanjong Pagar |
| Inhouse Employer | North | Industrial / Factory | SSO | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | Lakeside |
| Storm Protection Pte Ltd | West | Industrial / Factory | SS | SS | Joo Koon |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | CSO | Boon Lay |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SO | - |
| Reachfield Security & Safety Management Pte Ltd | West | Industrial / Factory | SS | SS | - |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Punggol |
| Force-One Security | East | Industrial / Factory | SO | SO | Punggol |
