| Metropolis Security Systems Pte Ltd | East | Commercial | SO | SO | Simei |
| King's Security and Safety Management Pte Ltd | East | Commercial | SO | SO | Simei |
| Uniforce Security Services Pte Ltd | East | Commercial | SO | SO | Simei |
| Jasa Investigation & Security Services Pte Ltd | East | Commercial | SO | SO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SO | SO | Simei |
| RAS Security Pte Ltd | North | Commercial | SSO | CSO | Choa Chu Kang |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Choa Chu Kang |
| Force-One Security | Central | Commercial | SO | CSO | Pasir Ris |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Simei |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Storm Protection Pte Ltd | South | Commercial | SO | SO | Admiralty |
| Eagle I Security Services Pte Ltd | East | Commercial | SO | SO | Bras Basah |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Bedok |
| RAS Security Pte Ltd | East | Commercial | SSO | SSO | Bedok |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| Soverus Pte Ltd | Central | Commercial | SSS | SSS | Jurong East |
| RAS Security Pte Ltd | North | Commercial | SSO | Nil | Bukit Batok |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
| Force-One Security | Central | Commercial | SO | SSO | Choa Chu Kang |
| Certis Group | Central | Commercial | SO | SSO | Choa Chu Kang |
