| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Ang Mo Kio |
| GoMobile Security Solutions Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| Securus Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| SATS Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| SMS Investigation & Security Pte Ltd | Central | - | OM | 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 |
| Acestes Pte Ltd | Central | - | Security Mgt | Nil | Ang Mo Kio |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | Security Mgt | Nil | Ang Mo Kio |
| TwinRock Global | Central | - | Security Mgt | Nil | Ang Mo Kio |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Ang Mo Kio |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | Nil | Ang Mo Kio |
| Acestes Pte Ltd | Island Wide | - | OM | Nil | Ang Mo Kio |
| SATS Ltd | Island Wide | - | Inves | Nil | Tampines East |
| SATS Ltd | Island Wide | - | OM | Nil | Novena |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SO | Nil | Kembangan |
| AETOS Holdings Pte Ltd | Island Wide | Mix-Development | APO | Nil | Admiralty |
| Eagle I Security Services Pte Ltd | West | Condominium | SO | Nil | Boon Lay |
| RAS Security Pte Ltd | North | Commercial | SSO | Nil | Bukit Batok |
| SATS Ltd | Island Wide | - | OM | Nil | Tampines |
