| William Secure Solutions Pte Ltd | South | Condominium | SO | SO | Mountbatten |
| Premier Security Co-operative Ltd | South | Commercial | SO | Nil | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Toa Payoh |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Toa Payoh |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| Resorts World Sentosa | South | Commercial | SS | SS | Pasir Ris |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| Metropolis Security Systems Pte Ltd | South | Commercial | SSS | SSS | Woodlands |
| Resorts World Sentosa | South | Commercial | SS | SSS | Dover |
| Reachfield Security & Safety Management Pte Ltd | South | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | South | School | SO | SO | Punggol |
| Inhouse Employer | South | In-House | SO | SSS | MacPherson |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Jurong East |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | SSO | Jurong East |
| Resorts World Sentosa | South | Commercial | SS | SSS | Woodlands |
| Pan Pacific Singapore | South | In-House | Security Mgt | Nil | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
