| Force-One Security | North | Data Centre | SO | SO | Hougang |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Sengkang |
| Inhouse Employer | North | In-House | SO | SSO | Bukit Gombak |
| RAS Security Pte Ltd | North | Commercial | OE | SSO | Tuas Link |
| Focus Security Services Pte Ltd | North | Condominium | SSO | SSO | Pasir Ris |
| Focus Security Services Pte Ltd | North | Condominium | SSO | SSO | Pasir Ris |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sembawang |
| Focus Security Services Pte Ltd | North | Condominium | SS | SSS | Yishun |
| Force-One Security | North | Data Centre | SS | SSS | Yishun |
| Premier Security Co-operative Ltd | North | School | SSS | SSS | Ang Mo Kio |
| Force-One Security | North | Data Centre | SS | SO | Sengkang |
| Inhouse Employer | North | In-House | SO | SS | Yishun |
| Force-One Security | North | Data Centre | SS | SSS | Yishun |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Yishun |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | Industrial / Factory | SS | SSS | Yishun |
| Force-One Security | North | Data Centre | SS | SS | Woodlands |
| Triple ‘S’ Protection Pte Ltd | North | Depot | SS | SS | Marsiling |
| Force-One Security | North | Data Centre | SS | SS | Marsiling |
| Force-One Security | North | Data Centre | SO | SS | Marsiling |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Marsiling |
| Certis Group | North | - | SO | Nil | Marsiling |
| Triple ‘S’ Protection Pte Ltd | North | Depot | SS | SS | - |
| Inhouse Employer | North | Commercial | SO | SSO | Choa Chu Kang |
| Triple ‘S’ Protection Pte Ltd | North | Depot | SS | SS | - |
