| York Hotel (Private) Limited | Central | In-House | SO | SO | Bedok |
| Inhouse Employer | East | Country Club | SO | SO | Tampines |
| Certis Group | Island Wide | Gov Building | APO | Nil | Yishun |
| Fervour Pte Ltd | Island Wide | - | OM | SO | Woodlands |
| Inhouse Employer | East | In-House | SO | SSO | Pasir Ris |
| First Security & Private Investigation (Singapore) Pte Ltd | North | Condominium | SO | SO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SO | Bukit Batok |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | CSO | Toa Payoh |
| Elid Technology International Pte Ltd | West | Condominium | SS | CSO | Bukit Panjang |
| Certis Group | East | Gov Building | SO | SO | Sengkang |
| Crowne Plaza Changi Airport | East | In-House | OM | SS | Woodlands |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SSS | Yishun |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Tampines |
| Primesafe Security & Investigation Pte Ltd | South | Commercial | SS | SS | Boon Lay |
| Crowne Plaza Changi Airport | East | In-House | OM | SSS | Toa Payoh |
| Inhouse Employer | Island Wide | - | OE | SSS | Redhill |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Woodlands South |
| York Hotel (Private) Limited | Central | In-House | SS | SS | HarbourFront |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Aigle Security Pte Ltd | Island Wide | - | OE | SS | Admiralty |
| Orchid Hotel Private Limited | Central | In-House | OM | CSO | Toa Payoh |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Fervour Pte Ltd | Island Wide | - | OM | SSS | Pioneer |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | In-House | SSO | SSO | Jurong East |
| Security & Risk Solutions Pte. Ltd. | Central | - | Office Team | SSS | Jurong East |
