T. J. O'CONNOR & ASSOCIATES LIMITED

T. J. O'Connor & Associates is a long-standing civil and structural consulting engineering practice, delivering design expertise for Ireland's most significant infrastructural and iconic developments since 1937. The firm is recognised for its pioneering use of Building Information Modelling, becoming the first Irish consultancy to achieve certification to the international BIM standard I.S. EN ISO 19650, and for its commitment to a Net-Zero future.

Their civil engineering portfolio spans wastewater treatment, main drainage, water supply and flood-alleviation projects, exemplified by the award-winning upgrade of the Ringsend Waste-Water Treatment Plant - now capable of serving up to 2.4 million population equivalents, roughly 60 % of the nation. On the structural side, T. J. O'Connor & Associates delivered the world's first bi-steel core for the 3 million sq ft Dundrum Town Centre, showcasing innovative solutions for shopping centres, healthcare facilities, offices, industrial sites, hotels, education and residential schemes, as well as the preservation of historic buildings.

With a strong focus on engineering excellence and sustainable design, the practice serves a broad range of public and private clients across Ireland, helping to shape resilient, future-ready built environments.