| SATS Ltd | Island Wide | Commercial | SO | SS | Woodlands |
| Metropolis Security Systems Pte Ltd | Island Wide | Mix-Development | SSO | SSO | Bedok |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Hougang |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Pasir Ris |
| Star Security Services | Island Wide | - | Security Mgt | CSO | Pasir Ris |
| SECOM Singapore Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Reachfield Security & Safety Management Pte Ltd | East | Industrial / Factory | SO | SO | Bedok |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| Dragnet Smartech Security Pte Ltd | South | Mix-Development | SSS | CSO | Sembawang |
| Triple ‘S’ Protection Pte Ltd | North | Depot | SSO | SSO | Tampines |
| TwinRock Global | Central | - | Security Mgt | SS | Tampines |
| Inhouse Employer | South | In-House | SO | SO | Pasir Ris |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Bedok |
| ProtectPlus Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Certis Group | East | Gov Building | SO | SO | Bedok |
| Inhouse Employer | Central | Mix-Development | OE | SSS | Tampines West |
| Inhouse Employer | East | School | SO | SO | Serangoon |
| PICO Guards Pte Ltd | North | Data Centre | SS | SS | Ang Mo Kio |
| Prospect Protection Pte Ltd | West | Construction | SS | SS | - |
| Orchid Hotel Private Limited | Central | In-House | OM | SO | Sengkang |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Sengkang |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Pioneer |
| Apro Asian Protection Pte Ltd | Central | Commercial | SSO | SSO | Woodlands |
