| Prosec Services Pte Ltd | East | - | SSO | SSO | Tampines |
| Strive Security Pte Ltd | West | Dormitory | SO | SSO | Choa Chu Kang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Force-One Security | North | Data Centre | OE | SSS | Woodlands |
| Acestes Pte Ltd | Central | - | Security Mgt | SSS | Bedok |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Pioneer |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Force-One Security | North | Data Centre | OE | SO | - |
| SATS Ltd | Island Wide | Commercial | SO | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | Island Wide | Construction | OM | SSS | Braddell |
| ADT Integrated Security Solutions Pte. Ltd. | West | Commercial | SSO | SSO | Bukit Batok |
| Interlocal Exim Pte Ltd | Central | In-House | SO | SS | Hougang |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SO | Bukit Batok |
| Prosegur Singapore Pte Ltd | East | Commercial | SSO | SSO | Pasir Ris |
| M Social Singapore | Central | Hotel | OE | SS | Sengkang |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | CSO | Woodlands |
| M Social Singapore | Central | Hotel | OE | SS | - |
| SMS Security | East | Mix-Development | SSO | SS | Simei |
| SATS Ltd | East | - | OE | CSO | Marsiling |
| Elid Technology International Pte Ltd | East | Condominium | SS | SS | Punggol |
| Certis Group | Central | Commercial | SO | SSO | Bukit Batok |
| Inhouse Employer | Central | Hotel | SO | SO | Jurong East |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SSS | Yishun |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Hougang |
