| Brink's Singapore Pte Ltd | East | - | SO | SS | Bukit Batok |
| Inhouse Employer | Island Wide | - | OE | SSS | Woodlands |
| SATS Ltd | East | - | OE | SSS | Bishan |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Securus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Inhouse Employer | Island Wide | - | OE | SS | Sengkang |
| Soverus Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Certis Group | Island Wide | - | SO | SO | Punggol |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Star Security Services | Island Wide | - | Security Mgt | SS | Hougang |
| Fervour Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Securus Pte Ltd | Island Wide | - | OM | SS | Hougang |
| Acestes Pte Ltd | Island Wide | - | OM | SSO | Clementi |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSO | Clementi |
