| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | Nil | Bukit Batok |
| Mainguard Security Services (S) Pte Ltd | Island Wide | - | OE | Nil | Bukit Batok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SSS | Bukit Batok |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Premier Security Co-operative Ltd | South | Commercial | SO | Nil | Bukit Batok |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SS | Bukit Batok |
| AGS Integration Pte. Ltd. | Island Wide | - | SS | SS | Bukit Batok |
| Brink's Singapore Pte Ltd | East | - | SO | SS | Bukit Batok |
| AGS Integration Pte. Ltd. | West | In-House | SS | SSS | Bukit Batok |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Strive Security Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
| Grand Copthorne Waterfront Hotel | Central | In-House | Security Mgt | SO | Bukit Batok |
| SATS Ltd | Island Wide | - | Inves | Nil | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Bukit Batok |
