Technical Expertise

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

View all sectors


Commitment to Clients

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

View all Projects

Featured Project

Silvertown Tunnel London UK

Silvertown Tunnel
One of the largest engineering projects in the world.

learn more

Who We Are

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

learn more

Our Regions

Carbon Reduction Plan

About - office locations image

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

learn more

Stay Up-to-date

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

View all News

Featured News

MicrosoftTeams-image (76)

On 19th October 2023, ByrneLooby will rebrand to Ayesa

ByrneLooby will officially adopt the name of its parent company, Ayesa, a global engineering and technology services provider.

Learn more

Investing In Our People

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

meet our people

Our EDI Policy

Careers - Image

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

learn more

International Presence

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

Follow us:

  • LinkedIn - blue70px
  • Twitter - blue70px
  • Facebook - blue70px
  • Instagram - blue70px
  • Vimeo - blue70px
  • Issuu - blue70px


Contact Us

We would love to hear from you. Please fill in the quick contact form below.

Send a message

A465 Heads of the Valley




Future Valleys Construction


Galway, Ireland

Completion Date:

2015 - Ongoing

Contract Value



The A465 Heads of the Valleys route cuts across the top of the south Wales valleys, between the southern fringes of the Brecon Beacons National Park and the industrial centres of Newport, Cardiff, and Swansea to the south. The road passes through some stunning scenery and while the hilly terrain is certainly dramatic, its undulating route has called for extensive earthworks. To widen the road, it has been necessary for several locations to cut into the adjacent hillside, significantly steepening the road boundary which then needs reinforcement to stabilise the ground and remove the risk of collapse.

The scheme will improve road safety, reliability and travel times and includes extensive provision for active travel along the route. It is critical to the economic and social regeneration of the Heads of the Valleys area. 

Our role

Ayesa is the temporary works designer for Costain, providing the design of soil nails and temporary netting to support temporary slopes beneath the existing road to enable the construction of the permanent works. Ayesa analysed the cross sections to provide an assessment of the likely movements to ensure that the road remained serviceable. Ayesa defined the monitoring strategy and procedure to enable the movements to be checked to confirm that the temporary works were acting in accordance with the design.




Capital cost

GBP675 million

Road sections

5 & 6

We support your projects

Our goal is to provide you with the best services for your needs