Technical Expertise

Multidisciplinary teams comprising of specialists across ten industry sectors, we have the expertise necessary to grapple with challenging assignments.



Commitment to Clients

Our business is built on relationships, and our clients will always be our top priority.

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Featured Project


Santiago Bernabéu Stadium
Management & supervision of the transformation of an iconic stadium.

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Who We Are

International Award-Winning Engineering Consultants who deliver ground breaking solutions at the forefront of industry best practice.

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Our Regions

Carbon Reduction Plan

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Our Commitment to Net Zero
ByrneLooby is committed to becoming a net zero engineering consultancy by 2040

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Stay Up-to-date

Stay on top of the latest developments, appointments, awards and more across all our offices.

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Featured News


Ayesa ranks #43 in the Top 225 International Engineering Firms

Ayesa ranks #3 in the Top 10 international engineering firms in the region of Latin America


Investing In Our People

Cultivating a culture in which individual differences and the contributions of our staff are recognised and valued.

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Our EDI Policy

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Celebrating People
Fostering a culture where you are encouraged to be yourself.

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International Presence

Multidisciplinary team comprising of specialists across Ireland, UK and the Middle East.

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Owen O'Leary

Finance Director


Owen leads the Finance team in management accounting and reporting for all companies in the ByrneLooby Group. Owen is a Fellow Chartered Accountant (FCA) of the Institute of Chartered Accountants in England and Wales and has 35 years’ experience in commerce. He is skilled in the management of rapid growth in companies, funding and profit delivery.

Since he joined ByrneLooby, the company has grown significantly. Seven new business units have been opened and three companies have been acquired by the ByrneLooby Group in that time. Owen has been heavily involved in these acquisitions, and in the introduction of new systems and KPI reporting in the various business units.

A highlight for Owen has been the acquisition of Sinclair Johnston & Partners in 2017, Terraconsult limited and managing the acquisition of ByrneLooby by Ayesa. Owen employed a combination of acumen and attention to detail to coordinate with a large number of different parties and to ensure the acquisition reached a successful conclusion for all involved.

Under Owen’s financial supervision, ByrneLooby consistently delivers profit and continues to grow year on year.

Collaboration and entrepreneurship. Freedom to shape your vision.