| Securus Pte Ltd | North | Commercial | SO | SO | Yishun |
| Regal Security & Fire Management Services Pte Ltd | Central | In-House | SSO | SS | Bukit Batok |
| Force-One Security | North | Data Centre | SS | SS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | CSO | Toa Payoh |
| GATES PCM Integrated Services Pte Ltd | Central | Commercial | SO | SO | Novena |
| Inhouse Employer | South | In-House | SSO | SO | Bedok |
| Excellent Security & Safety Pte Ltd | East | Industrial / Factory | SSO | SSO | Bukit Batok |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Sengkang |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Commonwealth |
| Eagle I Security Services Pte Ltd | East | - | SO | CSO | Bedok |
| SATS Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| Crowne Plaza Changi Airport | East | Hotel | SO | SS | Pasir Ris |
| Ranger Investigation & Security Services Pte Ltd | West | Construction | SO | SO | Bukit Batok |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Ademco Security Pte Ltd | South | Mix-Development | SSO | SSO | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | SS | Tampines |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Retail | SO | SO | - |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Sengkang |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Pasir Ris |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SS | Sengkang |
