Dominic O'Connor Ltd is a mechanical services and decarbonisation contractor, delivering installation, retrofit and maintenance work across education, healthcare, commercial and industrial sectors in Ireland.
Founded in 1999, Dominic O'Connor Ltd was established to deliver mechanical services work to the standard that schools, hospitals and universities actually need: on programme, properly commissioned, and built to last. Over 25 years and 500+ projects, that same standard now underpins every project we take on, from a single school retrofit to multi-building campus upgrades.
As the built environment shifts towards lower-carbon operation, we've grown alongside it — adding a dedicated decarbonisation capability as a Pathfinder Programme partner, and a maintenance offering so clients can call on us across the full lifecycle of their mechanical plant, not just at handover.
Full mechanical installation — heating, ventilation, air conditioning, chilled water, drainage, domestic water services, medical gases and BMS controls — on new-build and refurbishment projects for main contractors and direct clients.
Air source and air-to-water heat pump retrofits, MVHR ventilation, fabric upgrades and solar PV installations that reduce carbon emissions and running costs, delivered under Department of Education and public sector energy retrofit programmes.
Planned preventative and reactive maintenance contracts that protect the performance of mechanical plant long after installation, keeping heating, cooling and ventilation systems running efficiently year-round.
Committed to delivering the highest quality engineering solutions on every project we take on.
Working closely with clients, architects and contractors to deliver on shared objectives.
Pioneering sustainable technologies and modern engineering approaches across every service line.
Leading the transition to net-zero buildings through expert decarbonisation.