| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Yishun |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Yishun |
| SATS Ltd | Island Wide | - | Inves | Nil | Bukit Batok |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SO | Punggol |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Pasir Ris |
| Inhouse Employer | Island Wide | - | OE | SSS | Toa Payoh |
| SATS Ltd | East | - | OE | SSS | Toa Payoh |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SSS | Sengkang |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SO | Choa Chu Kang |
| PICO Guards Pte Ltd | Island Wide | - | OE | SO | Choa Chu Kang |
| Security Masters Pte Ltd | Island Wide | - | SS | SS | Choa Chu Kang |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Jurong East |
| PICO Guards Pte Ltd | Island Wide | - | OE | SSS | Choa Chu Kang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | - |
| SATS Ltd | East | - | OE | SSS | Sengkang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| TwinRock Global | Central | - | Security Mgt | SSS | Sengkang |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SSS | Sengkang |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
