| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Jurong East |
| York Hotel (Private) Limited | Central | In-House | SO | SO | - |
| Inhouse Employer | Central | In-House | SO | SO | - |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Force-One Security | Central | Commercial | SO | SS | Hougang |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Inhouse Employer | Central | Hotel | SO | SSO | Woodlands |
| Inhouse Employer | East | School | SO | SSO | Woodlands |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SSO | Boon Lay |
| Premier Security Co-operative Ltd | East | Commercial | SO | Nil | Simei |
| Guthrie FMC Security Pte Ltd | West | Dormitory | SO | SSO | Choa Chu Kang |
| Elid Technology International Pte Ltd | West | Condominium | SO | SSO | Choa Chu Kang |
| Horus I (Private Limited) | South | Retail | SO | SS | Holland Village |
| Elid Technology International Pte Ltd | West | Condominium | SO | SSO | Choa Chu Kang |
| Brink's Singapore Pte Ltd | East | - | SO | SSS | Toa Payoh |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SO | SSO | Pasir Ris |
| Inhouse Employer | North | In-House | SO | SS | Jalan Besar |
| Inhouse Employer | West | Industrial / Factory | SO | SS | Jalan Besar |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SO | Woodlands |
| Inhouse Employer | Central | In-House | SO | SSS | Woodlands |
