| Inhouse Employer | North | In-House | SO | SSO | Woodlands |
| Singapore Security Force Pte Ltd | Island Wide | - | OE | SO | Tuas West Road |
| Premier Security Co-operative Ltd | Central | Healthcare | SSS | SSS | Yishun |
| Apro Asian Protection Pte Ltd | Island Wide | - | OM | SSS | Bishan |
| Supreme Security Agency Pte. Ltd. | West | Industrial / Factory | SO | SO | Woodlands |
| Security & Risk Solutions Pte. Ltd. | Central | - | Office Team | SSS | Jurong East |
| Reachfield Security & Safety Management Pte Ltd | South | School | SO | SO | Punggol |
| FormTeam Consultancy Pte Ltd | Island Wide | - | OE | CSO | Marsiling |
| G4S Secure Solutions (Singapore) Pte Ltd | South | Commercial | SSO | SSO | Simei |
| Inhouse Employer | Island Wide | Construction | OM | SS | Tampines |
| Certis Group | South | Healthcare | SS | SS | Admiralty |
| JEN Singapore Tanglin by Shangri-La | Central | In-House | OM | SSS | Queenstown |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Marsiling |
| Orchid Hotel Private Limited | Central | In-House | OM | SSS | Pioneer |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Choa Chu Kang |
| Certis Group | Island Wide | - | SSO | SO | Yishun |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SSO | Hougang |
| Soverus Pte Ltd | Central | Commercial | SSO | SS | Buona Vista |
| Ranger Investigation & Security Services Pte Ltd | East | In-House | SSO | CSO | Bedok |
| Inhouse Employer | Central | In-House | SSS | CSO | Toa Payoh |
| Danmax Security Management Pte Ltd | East | Condominium | SS | SO | Tampines |
| Security & Risk Solutions Pte. Ltd. | Central | - | Office Team | CSO | Boon Lay |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | West | Dormitory | SO | SO | Bukit Gombak |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | CSO | Toa Payoh |
| Force-One Security | North | Data Centre | SS | SS | Hougang |
