| IGC Security Services Pte Ltd | Central | Condominium | SS | SS | Woodlands |
| Premier Security Co-operative Ltd | East | Commercial | SS | SS | Woodlands |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Woodlands |
| SMS Investigation & Security Pte Ltd | South | Condominium | SS | SS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SS | Bukit Panjang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Panjang |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SS | Bukit Panjang |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SS | Bukit Panjang |
| Star Security Services | Island Wide | - | OE | SS | Bukit Panjang |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Bukit Panjang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Bukit Panjang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Bukit Panjang |
| FormTeam Consultancy Pte Ltd | West | Condominium | SS | SS | Jurong East |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Yishun |
| Metropolis Security Systems Pte Ltd | Central | Condominium | SS | SS | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Redhill |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SS | Simei |
| Soverus Pte Ltd | Central | Commercial | SSO | SS | Buona Vista |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SS | Simei |
| Hawkeye Security Solutions Pte Ltd | West | Industrial / Factory | SS | SS | Woodlands |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Woodlands |
| IGC Security Services Pte Ltd | Central | Condominium | SS | SS | Woodlands |
