| Force-One Security | Central | Commercial | SO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Yishun |
| Certis Group | Island Wide | Commercial | SO | SO | Yishun |
| Premier Security Co-operative Ltd | North | Commercial | SO | SO | Yishun |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Yishun |
| Force-One Security | Central | Commercial | SO | SO | Yishun |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Admiralty |
| Elitez Security Pte Ltd | West | Commercial | SO | SS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SSO | SO | Outram Park |
| Concorde Security Pte Ltd | Central | Commercial | SO | SSO | Redhill |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | Nil | Dover |
| Inhouse Employer | North | Commercial | SO | SSO | Bukit Gombak |
| Prosegur Singapore Pte Ltd | South | Commercial | SS | SS | Bishan |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Tiong Bahru |
| Force-One Security | Central | Commercial | SO | SSO | - |
| Soverus Pte Ltd | Central | Commercial | SSS | CSO | Bukit Panjang |
| Aigle Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Aigle Security Pte Ltd | East | Commercial | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Pasir Ris |
| Soverus Pte Ltd | Central | Commercial | SSS | CSO | Clementi |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Eunos |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Bedok |
| GATES PCM Integrated Services Pte Ltd | Central | Commercial | SO | SO | Mountbatten |
