| GPGannon Properties Dublin, IrelandReal Estate | Construction work Real estate services Home Building New Homes Family Homes | |
| EEEco Evolution Ferns, IrelandEnergy, Utilities & Waste Treatment | Construction work Industrial machinery Renewable Energy Solutions Hydro-Electric Schemes Micro Hydro | |
| ESErmen Systems Ltd Athlone, IrelandEnergy, Utilities & Waste Treatment | Construction work Industrial machinery Industrial Automation Light Sanitation Ventilation | |
| LGLisagallon Group Roscommon, IrelandEnergy, Utilities & Waste Treatment | Construction work Installation services (except software) Cable Installation Cable Recovery Fibre Optic Installation | |
| LLanogreen IrelandEnergy, Utilities & Waste Treatment | Construction work Industrial machinery | |
| PPPlantation Plants Bray, IrelandFacility Management | Agricultural, farming, fishing, forestry and related products | |
| | Construction work Architectural, construction, engineering and inspection services BER Part L Compliance Reports Technical Assessments | |
| EGEirGrid Group Dublin, IrelandEnergy, Utilities & Waste Treatment | Construction work Electrical machinery, apparatus, equipment and consumables; lighting Electricity Transmission System Operator Manage The Flow Of Power Electricity Grid | |
| CCIET Belmullet, IrelandEnergy, Utilities & Waste Treatment | Construction work Electrical machinery, apparatus, equipment and consumables; lighting Power Line Services Utility Infrastructure | |
| UIUnipipe Irl Ltd. Bray, IrelandEnergy, Utilities & Waste Treatment | Construction work Industrial machinery Heat Pumps Underfloor Heating Renewable Energy | |