We’re the trusted people clients count on to ensure things run more smoothly, profitably & enjoyably.

Established in Manchester back in 1999 by Dez Walker and Jon Sime, Walker Sime has developed from a two-man band into one of the North West’s most well-respected Construction Consultancies.

These days based out of three regional offices, our 80-strong team provides specialist services including Quantity Surveying, Project Management, Employers Agent, Commercial Consultancy, Dispute Resolution, Bills of Quantities and Construction Design & Management.

Our reputation as the go-to people for technical excellence and unrivalled client service is something we’re incredibly proud of. Always remembering that our clients get to choose the people they work with.

Those same clients turn to us time and time again, and continually feedback that – while they’re reassured by our obsessive attention to detail, our straight-talking, and our fearlessness to challenge the brief or deliver occasionally difficult news – their people always enjoy working with our people. We simply dig deeper than most to build rock solid relationships, built on trust, respect and likability.

We get invited, often via client referral, to consult on a remarkably broad mix of briefs – working across public and private sectors on projects ranging from large scale infrastructure commissions to landmark regeneration schemes. We work in virtually every sector including marine, ports, roads, rail, airports, residential, commercial, industrial, distribution, storage, hotels, retail, waste to energy, gas, defence, health, education to name a few.

The Walker Sime family

People people

Everyone knows people are the foundation of every great business. And we’re no exception. In fact, in a recent audit an independent brand consultant asked 24 of our clients, “What do you like best about working with Walker Sime?” – alongside our technical excellence, attention to detail and ultra-reliability, of course – the answer couldn’t have been more emphatic. “It’s all about the people.”

Duncan Firth

Managing Director

Duncan’s our MD. Sleeves rolled up and glass half full, he thrives on leading his 80-strong team from the front, inspiring and empowering them to deliver exceptional service and driving growth by making the exceptionally complex run smoothly. A more peoplier person you’ll struggle to find! His diverse experience spans SME to multinational, including a Director of Real Estate at Deloitte and a Project Lead on London 2012.


Dez Walker MRICS

Client Relations Director

Derek Walker, Dez to you, co-founded Walker Sime in 1999 after years as a Quantity Surveyor who was convinced there had to be a better way of doing business and serving clients – something he’d be proud to put his name to. Developing deep relationships based upon trust, with a can-do attitude, it’s fair to say Dez is obsessed with delivering the most remarkable customer experience possible.


Jon Sime MRICS

Client Relations Director

Jon Sime co-founded the business in 1999. Before that he put in a shift for a national PQS outfit, was Commercial Director for a well-respected Contracting firm, and also a Claims Consultant. He also did a stint Down Under, where he first met Dez. Regarded as Walker Sime’s Mr Unflappable, Jon takes the strategic lead in our Infrastructure team, helping clients manage risks and maximise returns.


Caroline Bacon Assoc CIPD

Director of People & Culture

Caz has been with us since 2003. She knows Walker Sime inside out and back to front. Better than anyone, she knows what makes our people tick and leads on helping make sure everyone’s happy working here. After years with the world’s longest job title; Head of HR, Finance, Facilities Management, Health & Safety, and Office Management we thought a promotion to Director of People & Culture suited her better.


Mark Bond MRICS FCIArb

Director / Quantity Surveying Infrastructure

Mark heads up Walker Sime’s Infrastructure team. A Chartered QS, he’s also a Fellow of the Chartered Institute of Arbitrators. Well-travelled, he’s worked on prestigious international commissions including major projects in the Transport, Utility, Power and Energy sectors in UK, South East Asia and the Middle East. Now, back home, he adds value by focussing on dispute avoidance and successful project delivery.


Gavin Garner

Director / Quantity Surveying

Gav joined the Walker Sime team in 2019 as Director of Quantity Surveying. Not only did he bring 20-odd years’ construction sector experience with him – having worked on countless landmark projects, many of them seriously complex, across a wide range of sectors – he brought a can-do attitude, a get-on-with-people character, a keen eye for the commercials and a reputation for digging deep to get the job done.


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.


Mark Parker MRICS

Director / Project Management

Mark Parker was Walker Sime’s first employee. He spread his wings for a while, honing his skills managing multi-disciplined construction projects, from site acquisition to contract completion, and also worked 10 years client-side. But he’s back! A rare breed, Mark’s a Chartered QS who’s equally accomplished as a level-headed, commercially switched-on PM who clients quickly warm to and trust.


Nick Wdowczyk MRICS


Nick joined the Walker Sime team back in 2008 as an ambitious Trainee Quantity Surveyor. Since then he’s grafted his way up to Director, responsible for our Yorkshire QS team’s day to-day delivery. Nick has outstanding technical ability and has a likeability factor our clients love. With construction sector experience under his belt including residential, commercial, industrial, transport, education, and healthcare he’s also an accomplished Employer’s Agent.


Chris Bentley

Non-Exec Director

Chris, a Chartered Accountant, is one of our NEDs. A Cambridge graduate in Computer Science, with an MBA, he’s co-founder of The Strategy Exchange; a corporate development and growth consultancy. Chris works closely alongside our management team, sharing gold dust insights learned throughout his remarkable international career, helping shape our business strategy and drive sustainable growth.


James Jennings

Non-Exec Director

James joined us as a NED in 2015. Starting out a Chartered Accountant, he more recently co-founded The Strategy Exchange; a corporate development and growth consultancy. In between he was Group M&A Director at Thomas Cook Plc, Group Strategy Director at MyTravel Group, CEO of Sale Sharks, a Director of Premier League Rugby and NED at Old English Inns and Genesis Restaurants. And breathe.


Peter Broughton

Associate Director

Peter was a member of the WCP team that became part of the Walker Sime family, following acquisition, in 2019. Joining as Associate Director taking the lead on the design and delivery of a nationwide portfolio of schemes for OnSide Youth Zones, along with a portfolio of leisure, industrial, and commercial projects.


Matthew Cowburn

Associate Director

Matthew has been with Walker Sime since 2016 when he joined us as Senior Project Manager. Since then he’s stepped up to Associate Director in our PM team. A dab hand at building trusting client relationships, Matthew’s a born communicator and natural problem-solver who’s also level-headed in his approach to issue resolution, with a knack for embracing new technologies to help improve efficiencies and project outcomes.


Tim Gardner

Associate Director

Tim is a highly experienced and technically accomplished Associate Director, particularly in engineering construction, with extensive worksite experience in the UK and overseas. Well-versed in carrying out pre and post contract services on new build capex projects, brownfield modification projects and term service contracts, he’s worked across many sectors including; marine, oil, gas and petrochemical, industrial, commercial, leisure, transport, and utilities.


Emma Garner

Associate Director - QSI

Emma’s worked in construction for more than 20 years, starting out as a site engineer before taking the world of planning by storm five years later. Passionate about delivering well-written programmes, with a wealth of large Public Sector experience – across Healthcare, Infrastructure, Residential, Energy and Pharma – she’s covered the UK, top-to-bottom and side-to-side.


Dom Gill MRICS

Associate Director - QSI

Dom, Associate Director in 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.


Tim McGreavy MCIOB

Associate Director

Tim is a highly experienced, well-connected and ultra-reliable Project Manager whose main focus is healthcare and public sector clients. With a head for managing growth and always ready to lead on strategy, he’s got extensive know-how of all things Project and Programme Management within NHS Trusts and with private healthcare providers. Tim’s also got a reputation for making sure complex projects hit their critical milestones, with relentless drive and energy, in spades.


Andrew McNaghten MRICS

Associate Director

Andy from Sheffield joined our team in 2018 as Associate Director. Experienced managing mixed-use construction projects, he’s our kind of person. Trusted and much-liked by clients, Andy’s an insanely safe pair of hands with an eagle-eye for detail and an enviable track record of success planning and programming the delivery of complex construction projects. He is responsible for our PM team in Yorkshire.

Bills of Quantities - Nick

Nick Quinn MRICS

Associate Director

Nick is one of Walker Sime’s talented Associate 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.


Graham Redfearn

Associate Director

Graham has tons of experience managing multi-disciplinary teams – from inception and feasibility to completion, handover and close out – on schemes spanning logistics, retail, leisure, residential, student accommodation, self-storage and financial sectors. Clients also have him on speed dial for Employer’s Agent, Cost Management, Contract Administration, and Project Management support.


Chris Tildsley MRICS

Associate Director

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.


Carolann Watson MRICS

Associate Director

Carolann manages our Manchester-based QS team. A Chartered QS, with almost 20 years construction sector experience, her early career was with a couple of the ‘big boys’ before deciding that Walker Sime is where her future’s at! A 5-year secondment as Commercial Lead at Manchester City Council, working in the Capital Programme and Procurement team, makes Carolann our go-to people person for all public sector enquiries.

Want to drill down for more detail?


We take pride that we support charities close to our hearts. To name a few, we have fundraised for Wirral Hospice St. Johns and Coffee4Craig, which provide support for the homeless community in Manchester. We recently took part in the Great Manchester Run, to raise funds for the Multiple Sclerosis Therapy Centre North West and the JLL Property Triathlon North, which supported JLL Property’s corporate charity, Crisis and Peels Group’s charity, the Christie. Dez Walker undertook the Barcelona Ironman to fundraise for the Christie and Ronald McDonald House. We’re also proud winners of the Liverpool Dragon Boat Race, in aid of Claire House Hospice for children.

See charity events


We’re proud to do our bit to inspire students to choose quantity surveying as a career path. We do this by visiting local schools and colleges such as Saddleworth School, Crompton House, St. Wilfred’s Sixth Form and St. Bede’s Catholic College as part of the RICS ‘Surveying the Future’ initiative. We also offer students the chance to gain work experience in our company and find out for themselves what quantity surveying is all about.



We’re all about building better environments, not just locally but when we can, on a global level. So we’re proud participants in the government’s cycle to work scheme – and recently gave our people a safer place for their new wheels with a new bike shelter funded by a grant from TFGM. We’re also a bit obsessed by recycling and make sure everyone who works here is too.


Employee wellbeing

We can’t be people people without putting our own employees first. So we go further than being compliant with the law in health and safety and follow best practice to promote health and wellbeing in leadership, absence management, health and safety, mental health, smoking, physical activity, healthy eating, alcohol and substance misuse.

  • Full accreditation of the Workplace Wellbeing Charter
  • Signatory to the RICS Inclusive Employer Quality Mark
  • Property Weeks ‘Best Places to work in Property 2019’
  • Greater Manchester Chamber of Commerce social value bronze award