| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SSO | Bukit Batok |
| Ranger Investigation & Security Services Pte Ltd | East | In-House | SSO | SSO | Boon Lay |
| Union Security Services Pte. Ltd. | East | Data Centre | SS | SS | Pasir Ris |
| G4S Secure Solutions (Singapore) Pte Ltd | East | Commercial | SSO | SSO | Tampines |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | SSS | Sengkang |
| Soverus Pte Ltd | Central | Commercial | SSS | SSS | Yishun |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Sengkang |
| Fervour Pte Ltd | North | Retail | SO | SO | Aljunied |
| Star Security Services | Island Wide | - | Security Mgt | Nil | Ang Mo Kio |
| SATS Ltd | Island Wide | - | OM | SSS | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SSS | Yishun |
| Acestes Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| SATS Ltd | Island Wide | - | Inves | SSS | Dakota |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Queenstown |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SS | Pioneer |
| FormTeam Consultancy Pte Ltd | West | Condominium | SS | SS | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | North | Industrial / Factory | SS | SSS | Yishun |
| G4S Secure Solutions (Singapore) Pte Ltd | West | Industrial / Factory | SO | SO | Boon Lay |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Sengkang |
| Inhouse Employer | North | Industrial / Factory | SSO | SS | Simei |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | SSO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | Central | School | Security Mgt | SS | Choa Chu Kang |
| York Hotel (Private) Limited | Central | In-House | SO | SSO | - |
| Kingston Property Maintenance Services Pte Ltd | Central | Mix-Development | SS | SSO | Admiralty |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | Bukit Gombak |
