| Inhouse Employer | West | In-House | OM | SSS | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | - | SSS | SSS | Yishun |
| SMS Investigation & Security Pte Ltd | South | Commercial | SS | SS | Yishun |
| AGS Integration Pte. Ltd. | West | In-House | SS | SS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Titanium Safety & Security Pte Ltd | North | In-House | OE | SS | Admiralty |
| Union Security Services Pte. Ltd. | Island Wide | - | OE | CSO | Choa Chu Kang |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Titanium Safety & Security Pte Ltd | North | In-House | SSO | SSO | Boon Lay |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Concorde Security Pte Ltd | Island Wide | - | OE | SSS | Woodlands |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OE | SS | Sengkang |
| Inhouse Employer | Central | Hotel | SO | SSO | - |
| Inhouse Employer | East | In-House | SO | SO | Pasir Ris |
| Star Security Services | Island Wide | - | OE | SS | Woodlands |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Peregrine Security Pte. Ltd. | Island Wide | - | OE | SS | Woodlands |
| Strive Security Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| AGS Integration Pte. Ltd. | Island Wide | - | OE | SS | Marsiling |
| Inhouse Employer | Island Wide | - | OE | SO | - |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SSS | Sengkang |
| Acestes Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Strive Security Pte Ltd | West | Dormitory | SO | SSO | Choa Chu Kang |
| Crowne Plaza Changi Airport | East | Hotel | Security Mgt | SSO | Hougang |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SSO | Simei |
