| Inhouse Employer | Island Wide | Construction | OM | SO | Sembawang |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| TwinRock Global | Central | - | Security Mgt | SS | Tampines |
| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Woodlands |
| Inhouse Employer | Central | In-House | SSS | CSO | Marsiling |
| Acestes Pte Ltd | Island Wide | - | OM | SS | Clementi |
| Focus Security Services Pte Ltd | Island Wide | - | SS | CSO | Marsiling |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | Central | In-House | SO | SSS | Potong Pasir |
| Securus Pte Ltd | Island Wide | - | OE | SS | Ang Mo Kio |
| Concorde Security Pte Ltd | East | Commercial | SO | SO | Punggol |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Queenstown |
| Acestes Pte Ltd | Island Wide | - | OM | SSO | Boon Lay |
| Triple ‘S’ Protection Pte Ltd | West | Commercial | SS | SS | Lakeside |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Sengkang |
| Aedge Services Pte Ltd | Island Wide | - | OM | SS | Pioneer |
| Inhouse Employer | East | School | SO | SO | Pasir Ris |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SSS | Sengkang |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Hougang |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Serangoon |
| Security Masters Pte Ltd | Central | Data Centre | SS | SS | Yishun |
