| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Bukit Batok |
| Soverus Pte Ltd | South | In-House | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| Soverus Pte Ltd | South | Commercial | SS | SS | Hougang |
| Certis Group | South | Healthcare | SS | SS | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| PICO Guards Pte Ltd | South | - | SSS | SS | Ang Mo Kio |
| Certis Group | South | Healthcare | SS | SS | Ang Mo Kio |
| Prosec Services Pte Ltd | South | Commercial | SSS | SSS | Tanjong Pagar |
| Aero Asia Security Systems Pte Ltd | South | Condominium | SO | SO | Redhill |
| Premier Security Co-operative Ltd | South | Commercial | SO | SO | Redhill |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Redhill |
| SMS Investigation & Security Pte Ltd | South | Condominium | SS | SS | - |
| ESA Security Pte Ltd | South | Hotel | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| Shangri-La Rasa Sentosa, Singapore | South | Hotel | OE | SSS | Dakota |
| Reachfield Security & Safety Management Pte Ltd | South | - | OE | SSO | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Pioneer |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SS | Pioneer |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SO | - |
| Soverus Pte Ltd | South | In-House | SSO | SO | Bukit Batok |
