| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | SSS | Bedok |
| SATS Ltd | Island Wide | - | OM | CSO | Marsiling |
| Inhouse Employer | North | In-House | SO | SO | Woodlands |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Tampines West |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SSS | Queenstown |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SSS | Kembangan |
| Union Security Services Pte. Ltd. | Island Wide | - | SSO | SSO | - |
| Inhouse Employer | East | Hotel | Security Managment | SSS | Ang Mo Kio |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Pioneer |
| Force-One Security | Central | Commercial | SO | CSO | Pasir Ris |
| Metropolis Security Systems Pte Ltd | Central | - | SSO | SS | Bukit Batok |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Jurong East |
| Star Security Services | Island Wide | - | Security Mgt | SS | - |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Kingston Property Maintenance Services Pte Ltd | West | Condominium | SO | SSS | Clementi |
| Soverus Pte Ltd | West | Industrial / Factory | SO | SSS | Jurong East |
| Inhouse Employer | Central | Hotel | SO | SSO | Bukit Batok |
| Hawkeye Security Solutions Pte Ltd | North | Commercial | SO | SO | Yishun |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Sengkang |
| William Secure Solutions Pte Ltd | West | Condominium | SO | SSO | Woodlands |
| Securus Pte Ltd | Island Wide | - | OM | Nil | Toa Payoh |
| GoMobile Security Solutions Pte Ltd | West | Condominium | SO | SO | Bukit Gombak |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Woodlands South |
