Engineering Excellence

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

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Our Services

Homan O’Brien are a leading Irish Consulting Engineering Practice specialising in the design and management of mechanical, electrical and lift services to all building types.

The company has grown through over 60 years of experience in the building industry by providing a quality professional service to all projects and clients on the domestic and international market. We have an ever expanding and dedicated workforce of highly qualified engineers available to undertake new projects.

Our services include:

  • Hospital Engineering
  • HVAC
  • Low Energy Building Design
  • Building Dynamic Simulation
  • Building 3D Modelling
  • Building Energy Rating (BER)
  • BREEAM Assessments
  • Vertical Transport Analysis and Design
  • Building Energy Audits
  • Expert Witness
  • Due Diligence


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.

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.

Management Systems

Homan O’Brien implement an integrated Quality, Health & Safety and Environmental Management System. Our management systems are registered with NSAI to the following standards:

  • ISO 9001:2008 Quality Management
  • ISO 14001:2004 Environmental Management
  • OHSAS 18001:2007 Occupational Health & Safety Management.

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.

Homan O’Brien received the first ever RIAI award for Sustainable Design with the innovative design utilised in Offaly Co. Council HQ in 2003. These designs have been further developed by additional sustainable systems in Tipperary County Council and Cork Civic offices. In 2014, Homan O’Brien was awarded the ACEI Presidents Award Winners for Excellence in the M&E Design of both the Mater Misericordiae University Hospital and M&E Design of Tullow Oil Technology Centre.

Dublin Landings
Ashfield Student Residence UCD

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.