| Guthrie FMC Security Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SSS | Sengkang |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SSS | Sengkang |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SSS | Sengkang |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| G4S Secure Solutions (Singapore) Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Soverus Pte Ltd | Island Wide | - | OE | SSO | Woodlands |
| Star Security Services | Island Wide | - | OE | SS | Bukit Panjang |
| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Bukit Panjang |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Panjang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Bukit Panjang |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Bukit Panjang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | CSO | Bedok |
| Star Security Services | Island Wide | - | OE | CSO | Bedok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Tampines West |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SSS | Tampines West |
| Kingston Property Maintenance Services Pte Ltd | Island Wide | - | OE | SSS | Tampines West |
