Our Story
Company history, present
and the future
Our Story
A heritage of innovation
It takes 10,000 hours of practice to become an expert. We’ve been in business for over 100 years. Of course engineering, mechanical and electrical services have changed since 1911. So have we. You don’t last this long without innovating. That’s why the same clients return to us again and again. They know they’re guaranteed responsive, expert technical knowledge.
Our Approach
- Continuous development
- Strong communication
- Collaboration
- Expert market knowledge
- Innovation
- Sustainability
- Quality

Manager
Cal McGarvey

Accounts Manager
Fiona Bothwell

Director
Ryan Young
Market-leading engineering services in the UK, NI, and Republic of Ireland
From your design & specification phase to the final snag list: supporting end-user clients, developers, main contractors, design and build contractors and PPP.
Mechanical Engineering
Tailored mechanical engineering for your expansion, refurbishment or new build.
Electrical Engineering
Your electrical engineering design partner throughout your project.
Sustainability Services
Sustainability engineering for NZEB, LEED, and BREEAM certification.
Digital Construction
Get the most from BIM with engineers who understand your requirements.
Our clients and projects
Careers
Unlike some larger engineering consultancy firms at Delap and Waller you’ll have the chance to develop a broad range of skills. Rather than being siloed into a specialist segment at the start, you’ll work alongside more experienced engineers across sectors.
News
Land Development Agency – New Framework Appointment
Delap & Waller have recently been appointed to the Professional Services Mechanical & Electrical Framework for the Land Development Agency, providing Mechanical, Electrical and Information Communications Technology engineering services. The Land Development Agency (LDA), is
ForHousing – New Framework Appointment
Delap & Waller have recently been appointed to the ForHousing Consultancy Services Framework, providing Mechanical and Electrical engineering services for both new build residential projects and refurbishment programmes for their existing stock. ForHousing, which is
Queen’s University Belfast – Advanced Manufacturing Innovation Centre (AMIC)
Delap & Waller are delighted to be working as Mechanical, Electrical and Sustainability Engineers for this prestigious £100m project. This development is being delivered and led by Queen’s University Belfast, alongside industry, Ulster University and
Get in touch
Tell us about your next project and find out about other ways we can support you with engineering consulting services.
If you are interested in a project or just need some question answered
Get in touch
Tell us about your next project and find out about other ways we can support you with engineering consulting services.
Delap and Waller have had an unbroken relationship with Marks and Spencer since 1985 having completed New Build, Extension and refurbishment projects across the UK and Ireland. They have worked with us to achieve our low carbon Store designs and have been engaged as we tried and tested many new products in the retail environment. During that period of time they have been engaged on small to multi Million Pound projects and are currently working with us on approximately 10 Development projects.
The company continue to deliver quality design information through our Store Development Process and are involved from feasibility through to project delivery on site.