| Ranger Investigation & Security Services Pte Ltd | Island Wide | - | SS | SS | Bukit Panjang |
| Primesafe Security & Investigation Pte Ltd | Island Wide | - | SS | SS | Bukit Panjang |
| Primesafe Security & Investigation Pte Ltd | Island Wide | Commercial | SS | SS | Tampines |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | - | SS | CSO | Bukit Panjang |
| Ranger Investigation & Security Services Pte Ltd | South | - | SS | CSO | Bukit Panjang |
| Ranger Investigation & Security Services Pte Ltd | South | In-House | SS | SS | MacPherson |
| Inhouse Employer | South | Hotel | SS | SS | Woodlands |
| Security & Risk Solutions Pte. Ltd. | East | Office Building | SS | SS | Simei |
| Security & Risk Solutions Pte. Ltd. | East | Office Building | SS | SS | Simei |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Metropolis Security Systems Pte Ltd | East | Condominium | SS | SSS | Tampines West |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Premier Security Co-operative Ltd | East | Commercial | SS | SS | Tampines |
| Ademco Security Pte Ltd | East | Industrial / Factory | SS | SS | Tampines |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Acestes Pte Ltd | Island Wide | - | SS | SS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island IWde | - | SS | SS | Buangkok |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SS | SS | Buangkok |
| Ademco Security Pte Ltd | East | Industrial / Factory | SS | SS | Tampines |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| Acestes Pte Ltd | Island Wide | - | SS | SS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SS | SS | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | SS | SS | Tampines |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSO | Choa Chu Kang |
