Mechanical Services
Decarbonisation
Maintenance
Welcome to
Dominic O'Connor Ltd
Engineering. Better.
Delivering mechanical services, HVAC, plumbing and decarbonisation solutions across Ireland's education, healthcare, commercial and industrial sectors.
+
Years Experience
+
Projects Delivered
Nationwide
Coverage Across Ireland
Education · Healthcare · Commercial · Industrial
Sectors Served
Who We Are
Engineering Expertise.
Practical Solutions.
For over 25 years Dominic O'Connor Ltd has delivered mechanical engineering solutions that improve building performance, reliability and efficiency.
From schools and healthcare facilities to commercial and industrial environments, we combine technical expertise with practical delivery — on time, on budget, and built to last.
What We Do
Our Core Services
Our Work
Selected Project Portfolio
Why Choose Us
Trusted By Clients Across Ireland
Sustainability
Supporting Ireland's Decarbonisation Journey
We're proud to be part of Ireland's transition to net-zero buildings. From the Pathfinder Schools Programme to commercial retrofits, our team delivers the technical expertise and practical solutions that make buildings cleaner, warmer and cheaper to run.
Why Choose Us
Trusted By Clients Across Ireland
We are always interested in hearing from talented people who want to make a real difference in the built environment. We offer a supportive, professional environment where your skills can grow.



