Insights

Strong Industry Presence O’Neill & Brennan has established itself as a leading construction staffing provider in the UK and Ireland, working with over 25 years of industry experience and a trusted brand reputation. This positions the company as a reliable partner for large construction contractors seeking staffing solutions.

Expanding Market Reach The company is experiencing significant growth and expansion across the UK and Ireland, indicating an increasing demand for construction staffing services and presenting opportunities to offer tailored recruitment and workforce management solutions.

Innovative Technology Adoption With substantial investment in state-of-the-art systems and software, O’Neill & Brennan demonstrates a focus on modern, efficient staffing solutions. This technological advancement opens doors for selling supplementary digital tools or integrated HR solutions to construction firms.

Diverse Partnerships and Initiatives O’Neill & Brennan’s collaborations with organizations like Buses4homeless, Wates, and Cidori, along with its social value initiatives like Constructing Futures, highlight a commitment to community engagement and social responsibility, which can be leveraged to target clients emphasizing corporate social responsibility.

Event Engagement Opportunity Recent participation as an exhibitor and recruiter at the Construction Jobs Expo 2025 shows active engagement in industry events, offering a platform to establish direct connections with regional construction companies and decision makers seeking staffing and talent solutions.

O’Neill & Brennan Tech Stack

O’Neill & Brennan uses 8 technology products and services including Atlassian, html5media, jQuery, and more. Explore O’Neill & Brennan's tech stack below.

  • Atlassian
    Application Development & Management
  • html5media
    Audio, Video, Graphics
  • jQuery
    Javascript Libraries
  • UPS
    Logistics
  • Cloudflare Bot Management
    Security
  • HTTP/3
    Web & Portal Technology
  • Adobe Fonts
    Web Fonts
  • Facebook
    Widgets

Media & News

O’Neill & Brennan's Email Address Formats

O’Neill & Brennan uses at least 1 format(s):
O’Neill & Brennan Email FormatsExamplePercentage
FLast@oneillandbrennan.comJDoe@oneillandbrennan.com
63%
First.Last@oneillandbrennan.comJohn.Doe@oneillandbrennan.com
24%
FirstLast@oneillandbrennan.comJohnDoe@oneillandbrennan.com
10%
First@oneillandbrennan.comJohn@oneillandbrennan.com
3%

Frequently Asked Questions

Where is O’Neill & Brennan's headquarters located?

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O’Neill & Brennan's main headquarters is located at 3 Darkes Lane Potters Bar, England en6 1ag United Kingdom. The company has employees across 3 continents, including EuropeNorth AmericaAsia.

What is O’Neill & Brennan's phone number?

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You can contact O’Neill & Brennan's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is O’Neill & Brennan's official website and social media links?

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O’Neill & Brennan's official website is oneillandbrennan.com and has social profiles on LinkedIn.

What is O’Neill & Brennan's SIC code NAICS code?

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O’Neill & Brennan's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 23 - Construction.

How many employees does O’Neill & Brennan have currently?

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As of June 2026, O’Neill & Brennan has approximately 496 employees across 3 continents, including EuropeNorth AmericaAsia. Key team members include Head Of Commercial: M. M.Head Of I.T Operations: A. A.Head Of Information Technology: A. A.. Explore O’Neill & Brennan's employee directory with LeadIQ.

What industry does O’Neill & Brennan belong to?

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O’Neill & Brennan operates in the Construction industry.

What technology does O’Neill & Brennan use?

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O’Neill & Brennan's tech stack includes Atlassianhtml5mediajQueryUPSCloudflare Bot ManagementHTTP/3Adobe FontsFacebook.

What is O’Neill & Brennan's email format?

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O’Neill & Brennan's email format typically follows the pattern of FLast@oneillandbrennan.com. Find more O’Neill & Brennan email formats with LeadIQ.

When was O’Neill & Brennan founded?

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O’Neill & Brennan was founded in 1990.

O’Neill & Brennan

ConstructionEngland, United Kingdom201-500 Employees

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.

Section iconCompany Overview

Headquarters
3 Darkes Lane Potters Bar, England en6 1ag United Kingdom
Phone number
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
23 - Construction
Founded
1990
Employees
201-500

Section iconFunding & Financials

  • $10M$25M

    O’Neill & Brennan's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    O’Neill & Brennan's revenue is estimated to be in the range of $10M$25M

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