| SATS Ltd | East | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Inhouse Employer | Central | Hotel | OE | SO | Choa Chu Kang |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | Nil | Telok Blangah |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | Nil | Lakeside |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSO | Tuas Link |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| PICO Guards Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| ProtectPlus Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | Nil | Ang Mo Kio |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | Nil | Ang Mo Kio |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| PICO Guards Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Concorde Security Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Inhouse Employer | Island Wide | - | OE | CSO | Marsiling |
| Securus Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| PICO Guards Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | CSO | Marsiling |
