| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Yishun |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Mountbatten |
| Inhouse Employer | East | In-House | SO | SO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Mountbatten |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | Mountbatten |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SO | Mountbatten |
| Certis Group | Island Wide | Commercial | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | - | SO | SO | Yishun |
| SATS Ltd | Island Wide | - | Inves | SO | Admiralty |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Yishun |
| Premier Security Co-operative Ltd | North | Commercial | SO | SO | Yishun |
| AETOS Holdings Pte Ltd | West | - | SO | SO | Yishun |
| Certis Group | East | Gov Building | SO | SO | Yishun |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Yishun |
| Force-One Security | Central | Commercial | SO | SO | Yishun |
| Force-One Security | North | Data Centre | OE | SO | Tampines |
| Ademco Security Pte Ltd | West | Industrial / Factory | SSO | SO | Jurong East |
| Certis Group | West | School | SSO | SO | Outram Park |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SSO | SO | Outram Park |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Inhouse Employer | East | In-House | SO | SO | Woodleigh |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| GATES PCM Integrated Services Pte Ltd | East | Condominium | SO | SO | Sengkang |
