| Inhouse Employer | North | Commercial | SO | SSO | Bukit Batok |
| A-SAT Pte Ltd | North | Commercial | SSO | SSO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Admiralty |
| Guthrie FMC Security Pte Ltd | North | Dormitory | SO | SO | Sembawang |
| Reachfield Security & Safety Management Pte Ltd | North | School | SSS | SSS | Pasir Ris |
| IGC Security Services Pte Ltd | North | Commercial | SO | SO | Punggol |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Yishun |
| Union Security Services Pte. Ltd. | North | - | SSO | SSS | Yishun |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SSS | Yishun |
| Bulls-Eye Security Services Pte Ltd | North | Condominium | SS | SS | Woodlands |
| Securus Pte Ltd | North | Condominium | SS | SS | Woodlands |
| Metropolis Security Systems Pte Ltd | North | - | SO | SSO | Sembawang |
| Eagle I Security Services Pte Ltd | North | Condominium | SS | SS | - |
| Force-One Security | North | Data Centre | OE | SO | Woodlands |
| Force-One Security | North | Data Centre | OE | SSO | Sengkang |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | CSO | Bedok |
| Metropolis Security Systems Pte Ltd | North | - | SO | SSO | - |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Marsiling |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | Nil | Ang Mo Kio |
| RAS Security Pte Ltd | North | Commercial | SSO | SO | Boon Lay |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Marsiling |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Marsiling |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Yishun |
| RAS Security Pte Ltd | North | Commercial | SSO | SS | Sembawang |
| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
