| Acestes Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Concorde Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Securitas Guarding Services (Singapore) Pte Ltd | East | Data Centre | SS | SS | MacPherson |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Yishun |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| SATS Ltd | Island Wide | - | Inves | SS | - |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Eunos |
| Inhouse Employer | North | Industrial / Factory | SSO | SSO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Bedok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSO | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SS | Bukit Batok |
| York Hotel (Private) Limited | Central | In-House | OM | SSS | Pasir Ris |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Simei |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Marsiling |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Yishun |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SS | Punggol |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| SATS Ltd | Island Wide | - | OM | SS | Punggol |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SO | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| Excellent Security & Safety Pte Ltd | Central | Industrial / Factory | SSO | SSO | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Sengkang |
