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

O’Neill & Brennan UK's NAICS code is 23 (Construction).

Insights

Market Position Established recruitment specialist in UK and Ireland construction with a long track record, credibility from industry accreditations and certifications, and a large national client base which indicates robust demand for staffing solutions.

Expansion & Growth Unprecedented growth and ongoing UK and Ireland expansion combined with investment in state-of-the-art systems suggests opportunities to upsell broader recruitment solutions, managed services, and digital tooling to optimize hiring for larger projects.

Tech Advancements Adoption of modern tech stack (Google Cloud, Office 365, tagging and analytics tools) creates a pathway to offer integrated recruitment analytics, automation, and candidate engagement platforms tailored to construction projects and timelines.

Publicity & Events Active participation in industry events such as Construction Jobs Expo indicates a proactive brand presence; potential to partner on sponsored programs, training initiatives, and value-driven employer branding packages.

Social Value & Partnerships Past social value initiatives and partnerships (Constructing Futures, Buses4Homeless, Wates/Cidori programs) reveal an opportunity to position as a trusted partner for sustainability, workforce development, and community-focused hiring contracts to win preferred vendor status.

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O’Neill & Brennan UK Tech Stack

O’Neill & Brennan UK uses 8 technology products and services including Crazy Egg, Facebook Pixel, Linkedin Insight Tag, and more. Explore O’Neill & Brennan UK's tech stack below.

Crazy Egg
Analytics
Facebook Pixel
Analytics
Linkedin Insight Tag
Analytics
Mimecast
Email Security
Google Cloud
Infrastructure As A Service
Flickity
Javascript Libraries
Office 365
Office Suites
Google Tag Manager
Tag Management

Media & News

O’Neill & Brennan UK's Email Address Formats

O’Neill & Brennan UK uses at least 4 email formats:

O’Neill & Brennan UK Email Formats	Example	Percentage
FLast@oneillandbrennan.com	JDoe@oneillandbrennan.com	63%
First.Last@oneillandbrennan.com	John.Doe@oneillandbrennan.com	24%
FirstLast@oneillandbrennan.com	JohnDoe@oneillandbrennan.com	10%
First@oneillandbrennan.com	John@oneillandbrennan.com	3%

Frequently Asked Questions

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

You can contact O’Neill & Brennan UK's main corporate office by phone at

+44-113-251-****

. 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 UK's official website and social media links?

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

How much revenue does O’Neill & Brennan UK generate?

As of October 2026, O’Neill & Brennan UK's annual revenue is estimated to be $10M - $25M.

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

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

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

As of October 2026, O’Neill & Brennan UK has approximately 494 employees across 4 continents, including Europe, North America and Asia. Key team members include Head Of I.T Operations: A. A., Head Of Security: G. G. and Head Of Information Technology: A. A. Explore O’Neill & Brennan UK's employee directory with LeadIQ.

What industry does O’Neill & Brennan UK belong to?

O’Neill & Brennan UK operates in the Construction industry.

What technology does O’Neill & Brennan UK use?

O’Neill & Brennan UK's tech stack includes Crazy Egg, Facebook Pixel, Linkedin Insight Tag, Mimecast, Google Cloud, Flickity, Office 365 and Google Tag Manager.

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

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

When was O’Neill & Brennan UK founded?

O’Neill & Brennan UK was founded in 1990.

O’Neill & Brennan UK

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

O’Neill & Brennan UK has approximately 494 employees.

Q: What technology does O’Neill & Brennan UK use?

O’Neill & Brennan UK's tech stack includes html5media, JSON-LD, DoubleClick Floodlight, HTTP/3, Mimecast.

ConstructionEngland, United Kingdom201-500 Employees

O’Neill & Brennan is a recruitment firm focused on the construction sector. It provides staffing solutions to large construction contractors in the UK and Ireland, backed by more than 25 years of industry experience to support project staffing needs. Founded in 1990 and based in Potters Bar, England, the company has developed a long-standing brand and a broad client base across the region. The firm holds industry accreditations and certifications that reflect its quality standards and professional competency.

In the construction recruitment market, the company operates with a national footprint and ongoing expansion across the UK and Ireland. A notable development in recent years is the launch of Constructing Futures in 2022, a social value initiative the firm began delivering.