About Dominic O’Connor Ltd
Built on trust, technical expertise and 25 years of practical delivery
Headquartered in Loughrea, Co. Galway, with offices in Cork and Dublin, we deliver mechanical services, decarbonisation and maintenance solutions to clients across Ireland.
25+
Years of Experience
500+
Projects Delivered
2024
Nationwide Coverage Achieved
Who We Are
From domestic plumbing to nationwide mechanical engineering
Dominic O’Connor Ltd is a mechanical engineering firm delivering HVAC, pipework, heating and laboratory installations across education, healthcare, commercial and industrial sectors. Our core services span Mechanical Services Engineering, Decarbonisation retrofits and full-range Maintenance for existing facilities.
Sectors We Serve
Healthcare Facilities
Pharmaceutical Plants
Hospitals
Educational Institutions
Commercial Buildings
Industrial Projects
What Drives Us
Our values
01
Excellence
Rigorous delivery on every installation, retrofit and maintenance contract we undertake.
02
Collaboration
Working closely with clients, design teams and main contractors to deliver as one team.
03
Innovation
Adopting sustainable technologies and smarter building systems as standard practice.
04
Sustainability
Supporting Ireland’s transition to net-zero buildings through decarbonisation expertise.
Our Story
Milestones since 2002
2002
Founded
Dominic O’Connor Ltd is established, delivering domestic and commercial plumbing services from Loughrea, Co. Galway.
2005
Healthcare HVAC
Expansion into healthcare HVAC projects, building expertise in complex clinical environments.
2010
Commercial & Industrial Growth
Growth into commercial and industrial sectors, broadening our project portfolio nationwide.
2016
Decarbonisation Division
Launch of our dedicated decarbonisation division, focused on retrofits and low-carbon upgrades.
2020
Pathfinder Programme Partner
Became a Pathfinder Programme partner, deepening our commitment to sustainable building services.
2024
Nationwide Coverage
Achieved nationwide coverage across Ireland, serving clients from Loughrea, Cork and Dublin.
CIBSE
Engineers Ireland
SEAI Registered
Safe-T-Cert
Pathfinder Partner