How many employees work at O'Neill & Brennan?
O'Neill & Brennan Construction Ltd. has 545 employees, according to Revelio Labs workforce intelligence data. The YoY growth rate is -4.6%.
Data source: Revelio Labs Coverage: Global workforce Latest update: December 2025
About O'Neill & Brennan
Established in 1990, O’Neill & Brennan has firmly cemented its position as a preferred supplier of staff to many of the largest construction contractors in the UK and Ireland. This is because we offer a long standing and trusted brand, utilising over 25 years of industry experience to deliver first class recruitment solutions for our clients. Our industry accreditations, awards and certifications, demonstrates the quality of our work, meaning we have not only the credibility and authority within the market place, but the integrity and competency with which we have been recognised, to deliver a full and comprehensive service to our customers. We specialise in the construction space and currently work with more clients nationally than any other construction recruitment companies. With unprecedented growth, expansion across the UK and Ireland, and significant investment in new, innovative, state-of-the-art systems and software, our desire to be the preferred staffing solutions provider of choice, has never been greater.
As of December 2025
O'Neill & Brennan
workforce metrics
Headcount
545
Avg. Salary
$54.6k
Tenure
4.0yr
Growth Rate
-4.6%
Hiring Rate
Attrition Rate
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Employee Headcount
Interactive chart of O'Neill & Brennan annual worldwide employee count from 2023 to 2025.
- O'Neill & Brennan total number of employees in 2025 was 545, a 4.6% decline from 2024.
- O'Neill & Brennan total number of employees in 2024 was 570, a 4.4% increase from 2023.
- O'Neill & Brennan total number of employees in 2023 was 546, a 2.8% increase from 2022.
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Employee Geographic Breakdown
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Active Job Postings
Interactive chart of O'Neill & Brennan annual active job postings from 2023 to 2025.
- O'Neill & Brennan active job postings in 2025 was 364, a 111.1% increase from 2024.
- O'Neill & Brennan active job postings in 2024 was 104, a 143.8% increase from 2023.
- O'Neill & Brennan active job postings in 2023 was 17, a 118.1% decline from 2022.
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Employee Sentiment
Sentiment Topics
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