| Union Security Services Pte. Ltd. | East | Data Centre | SO | SO | Simei |
| Prosec Services Pte Ltd | East | Data Centre | SO | SO | Simei |
| William Secure Solutions Pte Ltd | East | Healthcare | SO | SO | Simei |
| Royal Security Management Services Pte Ltd | East | Gov Building | SO | SO | Simei |
| Force-One Security | Central | Commercial | SO | CSO | Pasir Ris |
| Group Security Service Pte Ltd | East | Condominium | SO | SO | Simei |
| Unique Security Services Pte Ltd | East | Condominium | SO | SO | Simei |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Simei |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Simei |
| Force-One Security | North | Data Centre | SO | SO | Hougang |
| Prospect Protection Pte Ltd | East | Industrial / Factory | SO | SO | Simei |
| Prosec Services Pte Ltd | East | Data Centre | SO | SO | Simei |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Simei |
| Kingston Property Maintenance Services Pte Ltd | East | Condominium | SO | SO | Simei |
| William Secure Solutions Pte Ltd | East | Condominium | SO | SO | Simei |
| Sands Global Pte Ltd | East | Condominium | SO | SO | Simei |
| TwinRock Global | North | Condominium | SO | SSO | Yishun |
| Trek Investigations & Security Management Services Pte Ltd | Central | - | SO | SSO | Yishun |
| SMS Investigation & Security Pte Ltd | North | Condominium | SO | SSO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SSO | Yishun |
| Inhouse Employer | North | In-House | SO | SSO | Yishun |
| Ranger Investigation & Security Services Pte Ltd | North | Construction | SO | SSO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SO | SSO | Yishun |
| Elid Technology International Pte Ltd | North | Condominium | SO | SSO | Yishun |
