| Certis Group | Central | Healthcare | SO | SO | Punggol |
| Dragnet Smartech Security Pte Ltd | Central | Commercial | SO | SO | Punggol |
| Inhouse Employer | Central | In-House | SO | SO | Pasir Ris |
| William Secure Solutions Pte Ltd | East | Condominium | SO | SO | Sengkang |
| William Secure Solutions Pte Ltd | East | Condominium | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Sengkang |
| RAS Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Concorde Security Pte Ltd | East | Commercial | SO | SO | Sengkang |
| Premier Security Co-operative Ltd | East | Commercial | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Central | Commercial | SO | SO | Sengkang |
| SMS Investigation & Security Pte Ltd | East | Condominium | SO | SO | Sengkang |
| Certis Group | East | Gov Building | SO | SO | Sengkang |
| Inhouse Employer | Central | Country Club | OM | SO | Tampines |
| Certis Group | Island Wide | Commercial | SO | SO | Yishun |
| Certis Group | East | In-House | SO | SO | Pasir Ris |
| Reachfield Security & Safety Management Pte Ltd | East | School | SO | SO | Sengkang |
| Certis Group | East | In-House | SO | SO | Sengkang |
| Reachfield Security & Safety Management Pte Ltd | Central | Gov Building | SO | SO | Sengkang |
| Certis Group | Island Wide | Commercial | SO | SO | Sengkang |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SO | Bedok |
| Guthrie FMC Security Pte Ltd | North | Dormitory | SO | SO | Sembawang |
| Shine Security Agency Pte Ltd | Island Wide | - | OE | SO | Bukit Batok |
| Acestes Pte Ltd | Central | - | Security Mgt | SO | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OM | SO | Khatib |
| Acestes Pte Ltd | Central | - | Security Mgt | SO | Punggol |
