A globally recognised Tier 1 contractor with a £6 billion turnover is continuing its impressive expansion into the Cardiff market, just 12 months after establishing a regional presence. With a confirmed project pipeline exceeding £100 million, they are now looking to strengthen their commercial team with the appointment of a Senior Quantity Surveyor. You’ll be based in their newly opened, modern Cardiff office, working alongside a collaborative, forward-thinking team that values culture, innovation, and long-term career development. This is a unique opportunity to play a key role in shaping major projects across South Wales, with the full backing of one of the construction industry's most respected names. What we’re looking for: Proven experience as a Senior Quantity Surveyor Background with a Tier 1 contractor (or equivalent large-scale contractor) Experience in high-rise residential or major project delivery Strong commercial and contract knowledge (JCT/NEC) A proactive, team-first mindset What’s on offer: Competitive salary and package Exciting project portfolio worth £100m+ Career progression within a growing regional business A dynamic and supportive working environment O’Neill and Brennan values diversity and promotes equality, All individuals will be treated in a fair and equal manner and in accordance with the law regardless of gender, marital status, race, ...