| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| Primesafe Security & Investigation Pte Ltd | Island Wide | - | OE | CSO | Bukit Panjang |
| Brink's Singapore Pte Ltd | East | - | SO | SO | Pasir Ris |
| Union Security Services Pte Ltd | North | Healthcare | SO | SS | Woodlands South |
| ProtectPlus Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| Soverus Pte Ltd | Central | Data Centre | SSS | SSS | Woodlands |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Sengkang |
| Soverus Pte Ltd | Central | Industrial / Factory | SS | SS | Punggol |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SO | Serangoon |
| Premier Security Co-operative Ltd | North | Commercial | SO | SO | Yishun |
| SATS Ltd | East | - | OE | SSS | Yishun |
| Securus Pte Ltd | Island Wide | - | OE | SO | - |
| Inhouse Employer | Central | Mix-Development | OE | SSS | Tampines West |
| IGC Security Services Pte Ltd | Central | Condominium | SSO | SSO | Toa Payoh |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Yishun |
| Premier Security Co-operative Ltd | North | Commercial | SO | SSO | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSS | Woodlands |
| Metropolis Security Systems Pte Ltd | East | Condominium | SS | SS | Simei |
| Metropolis Security Systems Pte Ltd | East | Condominium | SS | SSS | Tampines West |
| Inhouse Employer | North | In-House | SO | CSO | Yishun |
| Premier Security Co-operative Ltd | South | Retail | SSO | SSS | Yishun |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SS | Woodlands |
| Republic of Singapore Yacht Club | West | In-House | SO | CSO | - |
