| Acestes Pte Ltd | Island Wide | - | OM | SO | Tampines East |
| SECOM Smart (Singapore) Pte. Ltd. | West | Commercial | SSO | SSO | Bukit Batok |
| Inhouse Employer | West | In-House | OM | SSO | Boon Lay |
| SATS Ltd | Island Wide | - | OM | SSS | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Central | Gov Building | SO | Nil | Jurong East |
| Union Security Services Pte. Ltd. | Central | Industrial / Factory | SS | SSS | Yishun |
| Horus I (Private Limited) | Central | Retail | SO | SO | Tai Seng |
| Elid Technology International Pte Ltd | East | Condominium | SS | CSO | Clementi |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | Punggol |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Inhouse Employer | South | In-House | SO | SO | Jurong East |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Choa Chu Kang |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Choa Chu Kang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Tampines |
| Inhouse Employer | Central | Hotel | SO | SSS | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Bukit Batok |
| Inhouse Employer at Changi | East | Commercial | OE | CSO | Sengkang |
| Primesafe Security & Investigation Pte Ltd | Island Wide | - | SS | CSO | Bedok |
| SMS Investigation & Security Pte Ltd | Central | - | OM | CSO | Marsiling |
| Legion Protection Pte Ltd | Island Wide | - | OE | SSS | Clementi |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Retail | SO | SO | - |
| Securus Pte Ltd | Island Wide | - | OM | SSS | Ang Mo Kio |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
