Walker Sime is a multidisciplinary construction consultancy built on people and backed for scale. We bring global capability to local delivery, combining rigorous technical expertise with human accountability. Independent in mindset, connected in reach, we focus on outcomes that stand up to scrutiny. Since 1999, we’ve earned a reputation for precision, clarity and trusted advice.
Today, as proud members of Hanmi Global Group, we retain the agility and personal accountability of a specialist consultancy — strengthened by access to extensive international experience, resource and insight.
That means our clients work with a team that feels close, responsive and invested, while drawing on the strength of a global network with experience across major infrastructure, complex environments and high-value programmes worldwide.
Our leadership team
Jon Neville
Managing Director
Jon 'grew up' in oil and gas, leading major delivery programmes for the likes of E.On, SSE, National Grid and others. He loves the challenge of high-pressure infrastructure projects, but what he really loves is getting the best out of people, because that's what leads to more successful projects. A 'people person' to his core, he's one of the most natural 'fits' for Walker Sime you'll find — someone determined to help us grow, and in the right way.
jneville@walkersime.co.uk
jneville@walkersime.co.uk
Gregory Gordan
Financial Director
Greg joined us in 2020, bringing over 20 years finance experience with him. Oh, and his framed ACCA and AAT certificates. He’s worked across a variety of industries, including Refrigerated Shipping, Facilities Maintenance and Industrials Services, with multinationals, family-owned businesses and SMEs. Greg’s a proper people person who’s passionate about fair play and helping colleagues develop in their roles, and thrive.
ggordon@walkersime.co.uk
ggordon@walkersime.co.uk
Russell Wright-Turner
Director of Cost Management
Russell is a director within the Cost Management team and brings a wealth of experience, from delivering large, mixed-use regeneration schemes to sensitive commercial refurbishments – both in London and the North of England. After spending his entire early career at Davis Langdon, he went on to establish and lead Zerum’s cost management team from 2020 to 2025. Russell joined the leadership team at Walker Sime in September 2025, where he focuses on driving growth, data intelligence and enhancing value for clients through more informed decision making, efficient project delivery and robust cost certainty.
RWright-Turner@walkersime.co.uk
RWright-Turner@walkersime.co.uk
Dom Gill MRICS
Director of Infrastructure
Dom, Director of our Infrastructure division, has vast experience of complex projects in the Highways, Power, Gas & Oil, and Utilities sector. A Chartered QS with pre and post-contract experience, he’s worked with many of the UK’s largest clients, specialising in NEC form of contract, project controls and PMO environment. And reassuringly, he’s also a Managing Successful Programmes (MSP) Practitioner.
dgill@walkersime.co.uk
dgill@walkersime.co.uk
Cathy Palmer
Director of Regeneration Delivery
Cathy knows a thing or ten about what it takes to successfully deliver regeneration projects that genuinely transform towns and communities. The former Assistant Director for Deloitte Real Estate has already done it for Bolton and Wirral councils on some of the country's most ambitious regen programmes. At Walker Sime, she brings that shrewd master planning and place-making strategic know-how to an organisation as committed to community as she is.
cpalmer@walkersime.co.uk
cpalmer@walkersime.co.uk
Gareth Robertson
UK Director of Cost Management
Wherever Gareth goes, growth follows. Over eight years, Gareth was at CBRE, latterly as Senior Director where he grew the cost management team. Gareth sees people. Really sees them. His nous as a connoisseur of people was a big part of why we wanted him on our team. And it was our values and track record that inspired him to join us. A committed rugby fan and coach, he’s certainly “picked up the ball with the already strong QS team, and collectively moved the service line forward.”
grobertson@walkersime.co.uk
grobertson@walkersime.co.uk
Nick Quinn MRICS
Director, Bill of Quantities
Nick is one of Walker Sime’s talented Directors. He has a strong pedigree in Consulting and his construction sector experience includes over 15 years specialising in the production of Bills of Quantities – so naturally he heads up our dedicated BOQ team. He brings natural leadership qualities to his role managing his team of Quantity Surveyors, along with strong technical expertise and passion for delivering to the highest possible standard.
nquinn@walkersime.co.uk
nquinn@walkersime.co.uk
Chris Tildsley MRICS
Director Cost Management (Liverpool)
Chris manages our Liverpool QS team, working across all sectors. With over 20 years’ experience under his belt and a sky high reputation, his extensive skillset has helped ensure the success of countless projects. A real team player who’s always striving for first class delivery, he knows the commercial office, hotels and industrial sectors like the back of his hand, and has also worked extensively in Stadia, Residential, and Ports & Marine.
ctildsley@walkersime.co.uk
ctildsley@walkersime.co.uk
Mark Rendell
Director of Building Surveying
Mark is not a typical Building Surveyor. Chartered for over 20 years and an RICS Assessor, his career spans the UK and Middle East, including leading multi-disciplinary teams on major international projects as a Project Director. He has supported education estate expansion and developed refurbishment delivery models for PFI health centres. Combining technical insight with an evidence-led strategic approach, Mark helps owners and landlords maximise asset value through informed planning and delivery.
Mrendell@walkersime.co.uk
Mrendell@walkersime.co.uk
Our Values
We’re proud of what we do. And how we do it. That pride comes from knowing we’re making a real difference, project by project, decision by decision. We bring energy, clarity and quiet confidence to every challenge, always ready to ask the right questions – including the tough ones – if it leads to a better result. It’s in our nature to think ahead, act with purpose, and back ourselves to lead the way.
Optimism isn’t a gimmick. It’s how we think, lead and bring out the best in the people around us. It fuels our thinking, keeps us moving forward, and helps us stay calm under pressure. But we also know how to enjoy the ride. There’s a certain buzz about the way we work. Clients feel it. Colleagues feed off it. And yes, competitors notice it, too. It’s about showing up with the right mindset, every day – one that inspires confidence and makes good things happen.
Support, trust and mutual respect are at the heart of how we work – with each other, with our clients, and our communities. We look out for one another, make time for the things that matter, and don’t lose sight of the human side of business. The way we collaborate feels natural. Personal. Like family. And that closeness doesn’t just make Walker Sime a good place to work; it’s what makes us great to work with, too.
We keep things simple, honest and human – no fluff, no façade. No need to dress things up in industry buzzwords. We say what we mean and make it easy to follow. Egos left at the door, we meet people on the level, whether we’re presenting a strategy or rolling up our sleeves on-site. That straightforward approach makes collaboration easier, decisions faster, and relationships stronger. It’s not flash, but it works. And that’s what counts.
We’ve built our reputation by consistently showing up and doing things properly. Clients know we’re dependable. Not just when things are running smoothly, but when there’s pressure, complexity or something new to figure out. We earn trust by being thorough, proactive, and always focused on delivering the right outcome. People come to us for expertise but stay with us for the way we work; thoughtful, reliable,and committed to raising the bar, not simply meeting expectations.
We know the small stuff is the big stuff. We’re meticulous because precision buildstrust, reduces risk and drives better outcomes. We care deeply about getting things right, and we notice the things others might miss. It’s not about being perfectionists, it’s about being professionals. We stay focused, stay curious, and take pride in sweating the stuff that makes all the difference.
