| First Security & Private Investigation (Singapore) Pte Ltd | South | Condominium | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Bedok |
| William Secure Solutions Pte Ltd | South | Condominium | SO | SO | Mountbatten |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SO | Punggol |
| Inhouse Employer | South | In-House | SO | SO | Pasir Panjang |
| Inhouse Employer | South | In-House | SO | SO | Pasir Panjang |
| Inhouse Employer | South | In-House | SO | SSO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | - |
| Pan Pacific Singapore | South | In-House | Security Mgt | SS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Woodlands |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SO | Bright Hill |
| Inhouse Employer | South | In-House | SO | SO | Jurong East |
| Inhouse Employer | South | In-House | SO | SO | Pasir Ris |
| Inhouse Employer | South | In-House | SO | SSS | Woodlands |
| First Security & Private Investigation (Singapore) Pte Ltd | South | Commercial | SO | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | 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 | Toa Payoh |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SSS | Yishun |
