| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | CSO | Bedok |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Sembawang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Commonwealth |
| Triple ‘S’ Protection Pte Ltd | North | Shipyard / Port | SO | SSO | Marsiling |
| Prosec Services Pte Ltd | East | Data Centre | SSO | SO | Tampines |
| Acestes Pte Ltd | Island Wide | - | OM | SS | Punggol |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Sembawang |
| Fervour Pte Ltd | Island Wide | - | OM | SO | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Toa Payoh |
| Certis Group | Central | Healthcare | SO | SS | Holland Village |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Securus Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Crowne Plaza Changi Airport | East | In-House | OM | CSO | Toa Payoh |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SSS | Sengkang |
| Soverus Pte Ltd | Island Wide | - | SSS | SS | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SS | SS | Jurong East |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSS | Punggol |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Pasir Ris |
| Certis Group | Island Wide | - | SO | SS | Admiralty |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Singapore Security Force Pte Ltd | Island Wide | - | OE | SS | Kaki Bukit |
| Prosec Services Pte Ltd | East | Data Centre | SSS | CSO | Pasir Ris |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Dover |
