| Force-One Security | Central | Commercial | SO | SO | Yishun |
| Inhouse Employer | West | Commercial | SO | SS | Bukit Panjang |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SO | CSO | Bedok |
| Premier Security Co-operative Ltd | Central | Commercial | SS | SS | Toa Payoh |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Panjang |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SO | Khatib |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SS | Punggol |
| Uniforce Security Services Pte Ltd | East | Commercial | SS | SS | Tampines |
| Primesafe Security & Investigation Pte Ltd | Island Wide | Commercial | SS | SS | Tampines |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Sengkang |
| Securus Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Force-One Security | Central | Commercial | SO | SSO | Marsiling |
| Premier Security Co-operative Ltd | East | Commercial | SS | SS | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SS | SS | Buangkok |
| Peregrine Security Pte. Ltd. | North | Commercial | SSO | SSO | Ang Mo Kio |
| Union Security Services Pte. Ltd. | North | Commercial | SSO | SSO | Ang Mo Kio |
| GATES PCM Integrated Services Pte Ltd | East | Commercial | SS | CSO | Bedok |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SSO | SSO | Yishun |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SSO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SSS | Boon Lay |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SO | Hougang |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SO | Hougang |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SO | SSO | Sengkang |
