| LGLisagallon Group Roscommon, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Installation services (except software) Cable Installation Cable Recovery Fibre Optic Installation | |
| EeStation Dublin, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Installation services (except software) EV Charging Charging Solutions Energy Management Software | |
| EEEco Evolution Ferns, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Industrial machinery Renewable Energy Solutions Hydro-Electric Schemes Micro Hydro | |
| ESErmen Systems Ltd Athlone, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Industrial machinery Industrial Automation Light Sanitation Ventilation | |
| LLanogreen ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Industrial machinery | |
| EGEirGrid Group Dublin, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Installation services (except software) Electricity Transmission System Operator Manage The Flow Of Power Electricity Grid | |
| CCIET Belmullet, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Installation services (except software) Power Line Services Utility Infrastructure | |
| GPGannon Properties Dublin, ÉireEastát Réadach | Construction work Real estate services Home Building New Homes Family Homes | |
| | Construction work Architectural, construction, engineering and inspection services BER Part L Compliance Reports Technical Assessments | |
| EEEirteck Energy Partners Ltd Redcastle, ÉireFuinneamh, Fóntais agus Cóireáil Dramhaíola | Construction work Installation services (except software) Electrical Installation Wind Turbines Wind Energy Sector | |