| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Security Masters Pte Ltd | North | Commercial | CSO | SS | Woodlands |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SS | Woodlands |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SSO | Boon Lay |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | Boon Lay |
| Force-One Security | North | Data Centre | SS | SSO | Simei |
| Force-One Security | North | Data Centre | OE | SSO | Simei |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sengkang |
| Union Security Services Pte. Ltd. | North | Commercial | SS | SS | Sengkang |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sengkang |
| Union Security Services Pte Ltd | North | Healthcare | SO | SO | Woodlands South |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | CSO | Pasir Ris |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Pasir Ris |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | CSO | Choa Chu Kang |
| RAS Security Pte Ltd | North | Commercial | SSO | CSO | Choa Chu Kang |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Choa Chu Kang |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | CSO | Pasir Ris |
| Force-One Security | North | Data Centre | SO | SO | Hougang |
| TwinRock Global | North | Condominium | SO | SSO | Yishun |
| SMS Investigation & Security Pte Ltd | North | Condominium | SO | SSO | Yishun |
| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SSO | Yishun |
