| Reachfield Security & Safety Management Pte Ltd | North | School | SO | SO | Yishun |
| Triple ‘S’ Protection Pte Ltd | North | Shipyard / Port | SO | SO | Yishun |
| PICO Guards Pte Ltd | North | School | SO | SO | Yishun |
| Securus Pte Ltd | North | Commercial | SO | SO | Yishun |
| Aspectus Consultancy Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Ademco Security Pte Ltd | North | Industrial / Factory | SO | SO | Yishun |
| Premier Security Co-operative Ltd | North | Commercial | SO | SO | Yishun |
| Certis Group | North | - | SO | SO | Yishun |
| Securus Pte Ltd | North | Commercial | SO | SO | Yishun |
| Ascentiaa Security Management Pte Ltd | North | Condominium | SO | SO | Yishun |
| Guthrie FMC Security Pte Ltd | North | Dormitory | SO | SO | Yishun |
| Elid Technology International Pte Ltd | North | Condominium | SO | SO | Yishun |
| PICO Guards Pte Ltd | North | School | SO | SO | Yishun |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Soverus Pte Ltd | North | School | SO | SO | Serangoon |
| Soverus Pte Ltd | North | School | SO | SO | Serangoon |
| Force-One Security | North | Data Centre | SO | SO | Serangoon |
| Security Masters Pte Ltd | North | Commercial | CSO | CSO | Marsiling |
| Force-One Security | North | Data Centre | SS | CSO | Marsiling |
| Inhouse Employer | North | In-House | SO | SSO | Yishun |
| Force-One Security | North | Data Centre | SS | SSS | Redhill |
| Force-One Security | North | Data Centre | SS | SSS | Redhill |
