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
Neil Fox promoted to Associate Director
Delap & Waller are delighted to announce that Neil Fox is now an Associate Director in the company. Neil has been with the company since October 2020, bringing 20 years experience and has been Chartered since August
Ryan Scott to be Joint Managing Partner of Delap & Waller
We are delighted to announce a recent development in our leadership team with the promotion of existing Director Ryan Scott to the role of Joint Managing Director Ryan will share the position with Michael O’Doherty who has been Managing
Delap & Waller achieve Cyber Essential Standard Certification!
Delap & Waller have achieved Cyber Essentials Standard Certification as implemented by ID Cyber Solutions. The Certificate certifies that D&W’s ICT defences, as assessed against the Cyber Essentials Implementation Profile [BIS/14/696], are suitable against commodity
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.