| SATS Ltd | Island Wide | - | OM | CSO | Pasir Ris |
| Aigle Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Panjang |
| Eagle I Security Services Pte Ltd | Island Wide | - | SS | SS | - |
| Regal Security & Fire Management Services Pte Ltd | Central | In-House | SSO | CSO | Bedok |
| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SO | Bukit Batok |
| Force-One Security | North | Data Centre | SS | SSS | Redhill |
| Park Regis by Prince, Singapore | Central | Hotel | SSO | SS | Aljunied |
| Reachfield Security & Safety Management Pte Ltd | North | - | SO | SO | Yishun |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | North | Construction | SO | SO | Pasir Ris |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SSS | Bedok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SS | Clementi |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SSO | Bukit Batok |
| Danmax Security Management Pte Ltd | East | - | OE | CSO | Bedok |
| Artyzen Singapore | Central | Hotel | SO | SO | Bedok |
| Inhouse Employer | Central | School | SO | SO | - |
| Securus Pte Ltd | Island Wide | - | OE | SSO | Simei |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Choa Chu Kang |
| Fervour Pte Ltd | West | School | SO | Nil | Woodlands |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Yishun |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SO | - |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Choa Chu Kang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Tampines |
| Kingston Property Maintenance Services Pte Ltd | Central | Condominium | SSO | SSO | - |
