| Concorde Security Pte Ltd | Island Wide | - | OE | SSS | Lakeside |
| Total Protection Solutions Pte Ltd | Island Wide | - | OM | SSS | Lakeside |
| Soverus Pte Ltd | West | Industrial / Factory | SO | SO | - |
| Inhouse Employer | Island Wide | - | OE | SS | Sembawang |
| Certis Group | Island Wide | - | SSO | SSO | Choa Chu Kang |
| Inhouse Employer | Central | Mix-Development | Security Mgt | SSO | Woodlands |
| G4S Secure Solutions (Singapore) Pte Ltd | East | In-House | SSO | CSO | Bedok |
| Securus Pte Ltd | Island Wide | - | OE | SSS | Pioneer |
| First Security & Private Investigation (Singapore) Pte Ltd | East | Condominium | SS | SS | Punggol |
| Metropolis Security Systems Pte Ltd | East | Gov Building | SO | SO | Kaki Bukit |
| Inhouse Employer | East | In-House | SO | SO | Simei |
| Certis Group | Central | Commercial | SO | SSO | - |
| Union Security Services Pte. Ltd. | North | - | SSO | CSO | Bedok |
| Inhouse Employer | West | Industrial / Factory | SO | SO | Bras Basah |
| Certis Group | Island Wide | - | SO | Nil | Bencoolen |
| Overseas (Singapore) Security & Private Investigation Consultants Pte Ltd | Island Wide | - | OE | SS | Woodlands |
| Triple ‘S’ Protection Pte Ltd | Island Wide | - | OM | SS | Choa Chu Kang |
| Force-One Security | North | Data Centre | SS | SS | Woodlands |
| Resorts World Sentosa | South | Commercial | SO | SO | Bukit Batok |
| Orchid Hotel Private Limited | Central | In-House | OM | SS | Pasir Ris |
| Danmax Security Management Pte Ltd | South | Condominium | SO | SO | - |
| Reachfield Security & Safety Management Pte Ltd | Island Wide | Commercial | OE | SSS | Yishun |
| ONE°15 Marina Sentosa Cove, Singapore | South | Country Club | SO | SO | Bedok |
| Royal Security Management Services Pte Ltd | Island Wide | - | OE | SS | Pioneer |
| Certis Group | Central | School | SSO | SSO | Bukit Batok |
