Engineering Excellence

We are one of Ireland’s leading independent consulting engineering practices specialising in designing mechanical and electrical building services for over 60 years. Our experience delivers innovative and excellent results.

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If you are looking for something new in 2021 why not talk to us.

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Recent Projects

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Ashfield Students Residence UCD

“Ashfield” Student Accommodation consists of 4 No. 5 storey accommodation blocks and roof level plant room.

Each floor level of the…

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Arthur Cox Corporate HQ Fit-out

New HQ Development at Earlsfort Terrace / Hatch Street comprising of 7-storey over 2-storey basement level for Arthur Cox.

Fit-out of…

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40 Molesworth Street

Complete Refurbishment of Existing Building to include new Floor at Roof Level for 3,000m2 City Centre Office Building for IPUT.


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About Us

Homan O’Brien was formed in 1990 by the amalgamation of two long established consulting engineering practices, Jacob and Partners (1955) and Seamus Homan Associates (1978).

Since its foundation, the practice has become firmly established for the excellence of its design concepts coupled with its committed policy of value for money engineering solutions.


Get in Touch

Email us or give us a call at our office in Booterstown.

We are always happy to discuss your projects and proposals and look forward to hearing from you

Sustainable Engineering Design Solutions

Homan O’Brien are recognised as pioneers in Sustainable Engineering Design Solutions in Ireland over the last 20 years and have achieved a number of notable firsts in Irish Engineering.

Homan O’Brien designed from first principles the first Ice Bank Thermal Storage System in Ireland in Beresford Court in 1992, the concept of which has been copied ever since.


We are affiliated to a number of professional bodies including Engineers Ireland, Association of Consulting Engineers of Ireland, Chartered Institution of Building Services Engineers, American Society of Heating, Refrigeration and Air-Conditioning Engineers, Institute of Healthcare Engineers and Estate Managers and the European Federation of National Engineering Associations.

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