| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SO | Bukit Batok |
| Triple ‘S’ Protection Pte Ltd | Island Wide | Commercial | SO | SO | Pioneer |
| 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 |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SO | - |
| Premier Security Co-operative Ltd | East | Commercial | SS | SO | - |
| IGC Security Services Pte Ltd | Central | Condominium | SS | SO | - |
| Chang & Chang Security Management Pte. Ltd. | Central | Condominium | SS | SO | - |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SO | SO | Punggol |
| Riverfort Pte Ltd | Central | Hotel | SO | SO | Punggol |
| GATES PCM Integrated Services Pte Ltd | West | School | SO | SO | Punggol |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | East | Dormitory | SO | SO | Punggol |
| Soverus Pte Ltd | North | School | SO | SO | Punggol |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | East | Dormitory | SO | SO | Punggol |
| ESA Security Pte Ltd | South | Hotel | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Punggol |
| Trek Investigations & Security Management Services Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Elitez Security Pte Ltd | East | Condominium | SO | SO | Punggol |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Punggol |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SO | SO | Punggol |
| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SO | Punggol |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Punggol |
| Force-One Security | East | Industrial / Factory | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | School | SO | SO | Punggol |
