| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Mountbatten |
| Prosegur Singapore Pte Ltd | East | Industrial / Factory | SO | SO | Kaki Bukit |
| Acestes Pte Ltd | Central | - | Security Mgt | SSO | Marsiling |
| SEOMEO RELC | Central | In-House | SO | SS | Aljunied |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Certis Group | Island Wide | Commercial | SO | SO | Yishun |
| Prosec Services Pte Ltd | East | Retail | SSO | SSO | Bedok North |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SSO | Bukit Batok |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| Inhouse Employer | Central | In-House | SS | CSO | Pioneer |
| Inhouse Employer | Central | Hotel | SO | SSO | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Woodlands |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Prosegur Singapore Pte Ltd | South | Commercial | SO | SO | Hougang |
| Force-One Security | Central | Commercial | SO | SSO | Simei |
| Chang & Chang Security Management Pte. Ltd. | East | Condominium | SS | SS | Tampines |
| A-SAT Pte Ltd | North | Mix-Development | SSO | SS | Woodlands |
| Crowne Plaza Changi Airport | East | Hotel | SO | SO | Sengkang |
| PICO Guards Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Elid Technology International Pte Ltd | West | Condominium | SS | SS | Marsiling |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Unique Security Services Pte Ltd | West | Commercial | SO | SO | Lakeside |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Yishun |
| Soverus Pte Ltd | Central | Commercial | SSS | SSS | Pioneer |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSO | Simei |
