| Elid Technology International Pte Ltd | West | Condominium | SO | SO | Bukit Panjang |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| SATS Ltd | Island Wide | - | OM | SS | Pioneer |
| Inhouse Employer | Central | Mix-Development | OE | SSS | Tampines West |
| Eagle I Security Services Pte Ltd | Island Wide | - | SS | SS | - |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Pioneer |
| Soverus Pte Ltd | North | School | SO | SO | Serangoon |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Inhouse Employer | North | In-House | SO | SO | Bukit Batok |
| Labourtel Management Corporation Pte Ltd | West | Dormitory | CSO | SSS | Yishun |
| Prosegur Singapore Pte Ltd | South | Commercial | SSS | SSS | Queenstown |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Grand Copthorne Waterfront Hotel | Central | In-House | SSO | SSO | - |
| A-SAT Pte Ltd | Island Wide | - | SSO | CSO | Bukit Panjang |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| SATS Ltd | Island Wide | - | OM | SSS | Dover |
| Inhouse Employer | Island Wide | Construction | OM | CSO | Yishun |
| Ranger Investigation & Security Services Pte Ltd | Island Wide | In-House | SS | SS | Woodlands |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SO | Woodlands |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SS | Bukit Panjang |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | CSO | Marsiling |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Chinatown |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| SMS Investigation & Security Pte Ltd | North | Condominium | SO | SO | Sembawang |
