| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSO | Jurong East |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| SMS Investigation & Security Pte Ltd | Central | - | OM | Nil | Telok Blangah |
| Acestes Pte Ltd | Island Wide | - | OM | SS | Punggol |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SSO | Jurong East |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | West | In-House | OM | SSS | Bishan |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SS | Tampines |
| Security & Risk Solutions Pte. Ltd. | Island Wide | - | OE | SS | Sengkang |
| RAS Security Pte Ltd | North | Commercial | SSO | CSO | Yishun |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SS | CSO | Clementi |
| Inhouse Employer | Central | Mix-Development | Security Mgt | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| TwinRock Global | Central | - | SO | CSO | Bedok |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Kingston Property Maintenance Services Pte Ltd | West | Condominium | SO | SSS | Clementi |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SS | Yishun |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | Nil | Tampines |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | Nil | Tampines |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SS | Woodlands |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Boon Lay |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SSS | Sengkang |
| Union Security Services Pte Ltd | North | Healthcare | SO | SO | Woodlands South |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | CSO | Pasir Ris |
