A. O'Neill Engineering Ltd

GA O’Neill Engineering Ltd is a specialist light‑ and precision‑engineering firm based in Shillelagh on the Carlow‑Wicklow border, serving the South East of Ireland. With over three decades of experience under founder Gerry O’Neill, the company delivers comprehensive engineering solutions that include design, fabrication, repairs and ongoing maintenance for a range of industrial sectors, most notably waste‑water treatment plants.

Their core specialisations encompass the manufacture of bespoke products such as bridge‑clarifier trench brushes, chain‑conveyor cleats, stillage frames for the automotive industry and custom‑fabricated shafts and coupler bearings for wastewater equipment. GA O’Neill also provides on‑site repair services and off‑site design work for local authorities, acting as a registered contractor for Uisce Éireann (Reg. No. 754). A fully equipped workshop houses milling machines, lathes, plasma cutters, welders and a mobile van unit, enabling rapid response across Dublin, Kilkenny, Waterford, Wexford, Carlow, Wicklow and Kildare.

Committed to value, the firm operates a lean structure that delivers projects on time, on budget and to a high quality standard, making it a trusted partner for councils, utilities and private industry alike.