In 2021, a management buy-out marked the beginning of a new chapter. Not a new business, but a renewed one.

Since then, Wallace Whittle has grown from £8m to £20m turnover, and from 80 to over 200 people, expanding our reach, strengthening our capabilities, and continuing to deliver for clients across the UK and beyond.

April 2026 marks five years since that moment and we’re celebrating it in a way that reflects who we are today: by telling our story, recognising our people, and looking ahead.

The past five years have seen us reach far beyond our original home in Scotland and Ireland. While we’ve always had a presence in Warrington, our new offices in Leeds, Birmingham and Manchester and significant growth of the London office, has positioned us as a truly national consultancy. Major investments have also been made to upgrade our office infrastructure, enhance sustainability services, and a focus on in-house training through our Academy – all in the name of quality of product, quality of service and investment in our people.

“It’s an incredibly proud moment, celebrating five years of outstanding growth while marking our 62 years of history.

Our goal with the buy-out was to return to what Wallace Whittle is at its core, while evolving how we operate in a modern market. We took our decades-old foundation of quality and re-engineered the business in 2021 to support much larger ambitions through organic, investment-led and acquisitional growth. Today, we think like a major player, but we act with the agility and personal touch of a boutique consultancy.”

– Allan McGill, Managing Director

Allan added:  “A huge part of our success is down to the partnerships we have forged. We haven’t simply chased new clients – we’ve deepened our relationships with existing ones who have entrusted us with increasingly complex, high-value work.

“As we look towards 2030, our focus remains on staying a people-first, quality-driven business, while continuing to expand our UK-wide presence. With more expertise in-house, we are reducing outsourcing and positioning ourselves for the future, ensuring that as we scale, we never lose the excellence that the 1964 founders established.”

We’re proud to work with clients and collaborators who trust us time and again. Many of those relationships span years – even decades – and remain central to how we continue to grow.

We may technically be over 60 years old, but this is a business that continues to evolve.

The last five years have shown what’s possible when experience meets ambition. And as we look ahead, we’re focused on continuing that momentum – investing in our people, expanding our reach, and shaping the future of sustainable engineering.

If you’d like to be part of the next 5, 10 or 50 years of Wallace Whittle, whether by joining our growing team or bringing us onboard to deliver your next project – reach out to [email protected] or find us on LinkedIn.