| 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 |
| PICO Guards Pte Ltd | North | Industrial / Factory | SO | SO | Bras Basah |
| Inhouse Employer | North | In-House | SO | SO | Bras Basah |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Bras Basah |
| Inhouse Employer | North | In-House | SO | SO | Bras Basah |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Marsiling |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | Boon Lay |
| RAS Security Pte Ltd | North | Commercial | SSO | Nil | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Tiong Bahru |
| G4S Secure Solutions (Singapore) Pte Ltd | North | School | SO | SO | Bras Basah |
| PICO Guards Pte Ltd | North | Industrial / Factory | SO | SO | Bras Basah |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Clementi |
| RAS Security Pte Ltd | North | Commercial | SSO | SSO | Commonwealth |
| Force-One Security | North | Data Centre | OE | SSS | Choa Chu Kang |
| Inhouse Employer | North | Commercial | SO | SSO | Choa Chu Kang |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Industrial / Factory | SO | SO | Potong Pasir |
| GoMobile Security Solutions Pte Ltd | North | Industrial / Factory | SO | SSO | Sembawang |
| Security Masters Pte Ltd | North | Commercial | CSO | SO | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | OE | CSO | Ang Mo Kio |
