| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SO | Bukit Batok |
| Legion Protection Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SO | Bukit Batok |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Sembawang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Commercial | SO | SO | - |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SO | - |
| Securus Pte Ltd | Island Wide | Commercial | SO | SO | Tampines |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Soverus Pte Ltd | South | In-House | SSO | SO | Bukit Batok |
| ESA Security Pte Ltd | South | Hotel | SSO | SO | Sembawang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Retail | SO | SO | - |
| Danmax Security Management Pte Ltd | West | Condominium | SO | SO | - |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SO | - |
| Orchid Hotel Private Limited | Central | In-House | OM | SO | Choa Chu Kang |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
