| Regal Security & Fire Management Services Pte Ltd | Central | - | OE | SS | Choa Chu Kang |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Choa Chu Kang |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Choa Chu Kang |
| Concorde Security Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Titanium Safety & Security Pte Ltd | Island Wide | - | OE | SO | Woodlands |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Stalwart Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Eagle I Security Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Soverus Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Crowne Plaza Changi Airport | East | In-House | OE | SS | Woodlands |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Ademco Security Pte Ltd | Island Wide | - | OE | SSS | Bedok |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bedok |
