Engineering. Better.
Dominic O’Connor Ltd has delivered mechanical services, decarbonisation and maintenance solutions across Ireland since 2002 — built on trust, technical expertise and 25 years of practical delivery.
Building services engineered to perform
Mechanical Services
HVAC, pipework, heating and laboratory installations delivered across education, healthcare, commercial and industrial sectors.
Learn more →Decarbonisation
Building retrofits, heat pumps and low-carbon energy upgrades that move facilities toward net-zero performance.
Learn more →Maintenance
Planned and reactive maintenance keeping mechanical systems in existing facilities running safely and efficiently.
Learn more →Recent projects
25 years of practical delivery, built on trust
From domestic and commercial plumbing in 2002 to nationwide mechanical engineering today, we’ve grown by doing the work right — across healthcare, education, commercial and industrial sectors.
Ready to start your next project?
Talk to our team about mechanical services, decarbonisation or maintenance support — nationwide across Ireland.