| Force-One Security | North | Data Centre | SS | SS | Woodlands |
| First Security & Private Investigation (Singapore) Pte Ltd | Central | Retail | SO | SS | Punggol |
| First Security & Private Investigation (Singapore) Pte Ltd | East | Condominium | SS | SS | Punggol |
| SMS Investigation & Security Pte Ltd | East | Condominium | SS | SS | Punggol |
| First Security & Private Investigation (Singapore) Pte Ltd | East | Condominium | SS | SS | Punggol |
| SMS Investigation & Security Pte Ltd | East | Condominium | SSO | SS | Punggol |
| SMS Investigation & Security Pte Ltd | Central | Commercial | SSO | SS | Punggol |
| Securus Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Securus Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Aero Asia Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Strive Security Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| RAS Security Pte Ltd | North | Commercial | OE | SS | Bukit Batok |
| Trek Investigations & Security Management Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Uniforce Security Services Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Acestes Pte Ltd | Central | - | Security Mgt | SS | Bukit Batok |
| Metropolis Security Systems Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Legion Protection Pte Ltd | Island Wide | - | OE | SS | Bukit Batok |
| Global Ritz Protection (Security Services) Pte Ltd | Island Wide | - | OE | SS | Sengkang |
| Ascentiaa Security Management Pte Ltd | Island Wide | - | SS | SS | Punggol |
| Paradox Singapore Merchant Court | Central | Hotel | SSO | SS | Choa Chu Kang |
| M Social Singapore | Central | Hotel | OE | SS | Yishun |
| Amara Singapore | South | In-House | SSO | SS | Yishun |
| Inhouse Employer | Central | Hotel | SS | SS | Yishun |
| GCH Pte. Ltd. | Central | In-House | SSO | SS | Yishun |
