| RAS Security Pte Ltd | North | Commercial | SSO | SO | Bukit Batok |
| Certis Group | Central | Commercial | SO | SO | Bukit Batok |
| Soverus Pte Ltd | South | In-House | SSO | SO | Bukit Batok |
| ESA Security Pte Ltd | South | Hotel | SSO | SO | Sembawang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| G4S Secure Solutions (Singapore) Pte Ltd | Central | Retail | SO | SO | - |
| Danmax Security Management Pte Ltd | West | Condominium | SO | SO | - |
| Reachfield Security & Safety Management Pte Ltd | North | Commercial | SO | SO | - |
| Orchid Hotel Private Limited | Central | In-House | OM | SO | Choa Chu Kang |
| Dragnet Smartech Security Pte Ltd | Central | - | Security Mgt | SO | Choa Chu Kang |
| G4S Secure Solutions (Singapore) Pte Ltd | South | - | SO | SO | - |
| Global Ritz Protection (Security Services) Pte Ltd | North | Commercial | SO | SO | - |
| Premier Security Co-operative Ltd | West | Dormitory | SO | SO | - |
| Inhouse Employer | North | In-House | SO | SO | - |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Condominium | SO | SO | - |
| Inhouse Employer | East | In-House | SO | SO | - |
| Resorts World Sentosa | South | Commercial | SO | SO | - |
| Securus Pte Ltd | South | Gov Building | SO | SO | - |
| SMS Investigation & Security Pte Ltd | Central | - | OM | SO | Bedok |
| Danmax Security Management Pte Ltd | West | Condominium | SO | SO | - |
| Inhouse Employer | North | In-House | SO | SO | - |
| Reachfield Security & Safety Management Pte Ltd | West | Commercial | SO | SO | - |
| Titanium Safety & Security Pte Ltd | North | Dormitory | SO | SO | Punggol |
| GATES PCM Integrated Services Pte Ltd | Central | School | SO | SO | Punggol |
| Uniforce Security Services Pte Ltd | East | Commercial | SO | SO | Punggol |
