| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | South | Commercial | SS | SS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SSO | SSO | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Premier Security Co-operative Ltd | North | Commercial | SSO | SS | Yishun |
| Soverus Pte Ltd | Island Wide | - | SSS | CSO | Tampines |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | SO | Bukit Batok |
| Ascentiaa Security Management Pte Ltd | East | Condominium | SSO | SSO | Pasir Ris |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Bukit Panjang |
| SMS Investigation & Security Pte Ltd | North | Condominium | SSO | SSO | Marsiling |
| Acestes Pte Ltd | Island Wide | - | OM | SSO | Boon Lay |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | Central | Depot | SSO | SO | Hougang |
| Acestes Pte Ltd | Central | - | Security Mgt | CSO | Toa Payoh |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Pasir Ris |
| TwinRock Global | West | Industrial / Factory | SO | SO | Boon Lay |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Simei |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Tampines |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | West | In-House | OM | SSS | Yishun |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Pasir Ris |
