| Premier Security Co-operative Ltd | North | School | SSS | CSO | Toa Payoh |
| Inhouse Employer | Central | Hotel | OE | SO | Choa Chu Kang |
| TwinRock Global | East | Condominium | SO | SO | Mountbatten |
| Soverus Pte Ltd | Central | Data Centre | SSS | SSS | Yishun |
| Aigle Security Pte Ltd | East | Condominium | SO | SO | Tampines |
| Inhouse Employer | Island Wide | - | OE | SS | Sembawang |
| SATS Ltd | Island Wide | - | Inves | Nil | Yishun |
| Triple ‘S’ Protection Pte Ltd | East | Commercial | SO | SO | Punggol |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Commercial | SS | SS | Buangkok |
| Elitez Security Pte Ltd | West | Industrial / Factory | SO | SO | Choa Chu Kang |
| Inhouse Employer | North | In-House | SO | SO | Pasir Ris |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Sengkang |
| Hawkeye Security Solutions Pte Ltd | Central | Condominium | SSO | SSO | Bukit Batok |
| Malaysia Dairy Industries Pte Ltd | East | Commercial | OE | SS | Ang Mo Kio |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SSO | Boon Lay |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Chinese Garden |
| Pedro Investigations & Security Services Pte. Ltd. | Central | - | SSO | SO | Bukit Batok |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Royal Security Management Services Pte Ltd | East | Commercial | SO | SO | Tampines |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| Acestes Pte Ltd | Island Wide | - | OM | Nil | Jurong East |
| Certis Group | Island Wide | - | SSO | SS | Choa Chu Kang |
| Inhouse Employer | Island Wide | Construction | OM | SSS | Tiong Bahru |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SS | Admiralty |
| Force-One Security | North | Data Centre | SS | SS | Jurong East |
