| Soverus Pte Ltd | Central | Commercial | SSS | CSO | Clementi |
| RAS Security Pte Ltd | Island Wide | Commercial | SSO | SS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Yishun |
| RAS Security Pte Ltd | North | Commercial | SSO | SSS | Yishun |
| Securitas Guarding Services (Singapore) Pte Ltd | West | Commercial | SSO | SSO | - |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SS | Ang Mo Kio |
| Dragnet Smartech Security Pte Ltd | West | Commercial | SSS | SSS | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SSO | Sembawang |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Prosec Services Pte Ltd | Central | Commercial | SSO | SSO | - |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SSO | SSO | - |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Hougang |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SO | Punggol |
| Inhouse Employer | North | Commercial | SO | SSO | Bukit Gombak |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Simei |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| SMS Security | East | Commercial | SSO | SS | Simei |
| RAS Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Concorde Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SO | SO | Sengkang |
| Certis Group | Island Wide | Commercial | SO | SO | Yishun |
| Certis Group | Island Wide | Commercial | SO | SO | Sengkang |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Woodlands |
