Meet Our People

Jason Warren

Managing Director

Jason has over 40 years of experience in the construction industry, covering projects from new build and heavy structural refurbishment through to complex Cat A and Cat B fit outs.

Jason joined Collins in 2013 and has been instrumental in developing and growing the reputation of the business. As managing director, Jason will continue to push forward the company's long term goals and ambitions, thereby paving the way for the next generation of leaders.

Jason is a firm believer in building strong, trusting relationships with clients and colleagues to help push the business forward, alongside a team of great people who are proud of the work they do.

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Karen Rosvall

Principal Design Manager

As Principal Design Manager, Karen will ensure the Design Management offer is consistent across the business whilst being flexible in its approach to support the client, project size and scope. With both architectural and engineering professionals making up the Design Management team, Karen's role is to co-ordinate the two disciplines and use her knowledge of the design process to ensure the team works as one to deliver a holistic structural and architectural programme from cradle to grave.

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Dick Humphreys

Project Director

Dick has worked in the industry for 11 years and joined Collins in 2012 as a Trainee Manager. During his time at Collins, he has worked on a variety of projects from high end Cat B fit outs to heavy structural refurbishments, using his skills and experience to ensure a proactive, solutions based approach for a smooth and enjoyable project journey for all involved.

Dick works collaboratively and transparently with his clients to ensure the project programme is managed effectively and delivered to the highest of standards. He has a hands on and honest approach with regular, short-term position programmes to make sure the whole team is aligned to deliver the client’s end goal.

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Stuart Johnson

Director

Stuart has worked in the fit out industry for 25 years and has held a number of roles including owning and running his own fit out company. His expertise has enabled Stuart to develop a number of strong client relationships in the industry that have contributed to Collins’ success. Stuart continues to lead teams on some of Collins most significant and complex projects, working in partnership with clients to achieve project success.

He has a number of strong client relationships that have contributed to Collins' success and growth, and still heads up projects secured with these clients, such as Land Securities.

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Anisha Mayor

Head of Sustainability

Anisha has studied and worked in the environmental sector for over 9 years and holds an Undergraduate and Master’s degree in Environmental Consultancy.

After joining Collins in 2018, Anisha has had an active role in delivering more strategic environmental support to the business.

She has developed an extremely strong relationship with all teams, which has aided in implementing and delivering industry leading sustainability standards. In addition to this, the rapport developed with each team has enabled collaborative thinking on each project, helping to investigate bespoke and innovative ideas to push Collins beyond compliance.

Prior to this, Anisha had worked on several multi-million pound construction projects in London, helping achieve FSC project certification and BREEAM.

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Rob Carr

Director

Rob has been working within the construction industry for over 30 years, most recently focusing on Cat A & B office fit out.

Having started his career as a construction trainee, Rob has worked through all project management disciplines. This means he is able to understand and work alongside his team with experience and knowledge, to ensure they are supported to be the best they can be.

Rob believes that honest conversations as early as possible create trust and builds lasting relationships which ensures peace of mind for his clients and consultants.

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Ryan Cleanthi

Divisional Director

Ryan is a dedicated and proficient Divisional Director with over 10 years’ experience within the industry.

He has extensive commercial knowledge, particularly within the fit out sector, to ensure best value for money is achieved for any given client.

Ryan has a dynamic, hands on approach which sets him apart from the competition. He is a strong believer in collaborative working, from supply chain to end user, allowing for a quality end product.

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Richard Harrison

Project Director

Richard has over 18 years of experience in the construction industry, predominately within the fit out and refurbishment sectors. Commencing his career as an electrical tradesman and joining Collins in 2014, he has developed his knowledge, skills and expertise across the construction disciplines to progress to the Project Director position he holds today.

He is skilled in the management of pre-construction and construction delivery, specialising in extensive design and build refurbishment contracts due to his experience in delivering technically challenging projects.

Richard is a highly motivated individual committed to ensuring each project is delivered to the highest standards and in line with the client needs.

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Ashraf Ali

Compliance Director

Ashraf leads our integrated approach to Health & Safety, Quality Assurance, Environmental and ESG, and regulatory governance. He provides strategic oversight to ensure alignment with UK legislation, industry standards, and Collins’ own high-performance benchmarks, protecting both delivery and reputation.

Ashraf also oversees the deployment of our technology and innovation frameworks, driving the adoption of digital systems, data-led tools, and AI to improve efficiency, risk management, and project outcomes across the business.

With over 20 years’ experience in construction and corporate real estate, he brings a practical, process-driven approach to embedding standards, enhancing visibility of risk, and enabling consistent, compliant delivery.

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Guy McCoig-Lees

Director

Guy joined Collins as Senior Commercial Manager in 2013, before being promoted to Commercial Director in 2017.

Guy has 25 years of experience in delivering a wide range of projects from Cat A and B fit outs in various market sectors such as finance, leisure and advertising, to complex heavy structural cut and carve refurbishment schemes.

Guy's understanding of the various market sectors allows him to bring added value and support to both the professional team and clients in terms of cost planning, value engineering and build ability.

Guys hands on approach makes him a safe pair of hands and an ideal mentor for the junior commercial staff within the business.

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Muhammed Ameen

Divisional Commercial Director

Muhammed graduated from the University of Westminster with a degree in Quantity Surveying and has worked in the construction industry for over 10 years, where he has gained experience in public sector contracts and large framework agreements.

Muhammed joined Collins as a Project Surveyor in 2016 and has successfully progressed to Divisional Commercial Director. Muhammed now works across a wide range of projects; from high end fit outs to complex design and build. His role is to ensure the commercial team works collaboratively with the project team whilst maintaining high standards in both pre-construction and delivery phases.

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Sarah Park

Communications Director

Sarah Park is a communications consultant who has worked with Collins for over six years, supporting the business in shaping both its internal culture and external reputation.

With a background in journalism and strategic communications, Sarah focuses on creating clarity and consistency across the business. Internally, she works to build engagement and alignment, helping teams understand their role and become confident advocates for Collins.

Externally, Sarah leads on communicating Collins’ expertise in a way that is authentic and grounded in delivery. Her work ensures that the company’s projects, people and capabilities are represented clearly, strengthening its reputation across the industry.

Sarah works closely with the leadership team to ensure communication supports the long-term ambitions of the business and reflects how Collins operates in practice

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Mary Brooks

Finance Director

Mary is a qualified chartered accountant who began her career as an auditor. She has held senior finance positions in the leisure and retail sectors before embarking on a career in the London refurbishment and fit out market in 2006, joining Collins in 2012.

Mary was appointed to the board as Finance Director in 2015. She is responsible primarily for the finances but also oversees HR policies and procedures.

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Duncan Redman

Divisional Director

Duncan joined Collins in 2001 and has been a part of, and contributed to, the growth, development and success of the company. Having worked in the industry for over 30 years, Duncan has a wealth of experience and knowledge across a range of project types, from Cat B fit out to cut and carve refurbishment.

Duncan leads a committed, hardworking team who go the extra mile at every level to deliver a successful project. He believes in a hands on approach and management style, and leads his teams by example. He builds strong, honest relationships with clients which as a result, has consistently led to repeat business.

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Chris Bartram

Non-Executive Director

Chris has worked at Collins for over 35 years, where he has been intrinsic in the development of the business from a small, traditional builder with a handful of employees, to a successful and well known business of 160 employees.

He is a firm believer in collaborative working, trust and ‘doing the right thing’ to support the company’s long term ambitions.

This approach is reflected in Collins' reputation in the market, stability and regular ‘preferred contractor’ status with clients and design teams.

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Crawford Dunn

Project Director

Crawford has been working in the construction industry since the age of 17 and he has over 40 years experience.

He has worked in prestige buildings like the Dorchester, Harrods and Selfridges. His focus is to ensure that he provides best value by understanding the client’s objectives and using his experience and knowledge to achieve this.

Crawford thrives on building excellent relationships by being open and transparent throughout the entire process, with a strong focus on quality, passion to understand the vision behind the design, and always completing to a very high-quality finish.

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Mark Dockery

Non-Executive Director

Mark has now worked in the construction industry for 42 years, and for over half of that time, 22 years, he has been an integral part of the Collins board helping to shape our offering to the market.

Like all the senior leaders at Collins, Mark has a hands-on approach while leading the pre-con and estimating function, and working closely with a dedicated, proactive, and inspirational team. He has seen the industry shift from a very traditional based procurement process, through to the now ever challenging design & build offering, and Marks work winning team look to cover risk yet provide suitable commercial opportunities while ensuring that our quality will never be affected in the lead up to a contract award.

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Paul Chandler

Divisional Commercial Director

Paul has worked in the construction industry for 17 years and has a vast experience in the London and the South East markets, delivering a variety of new build, fit out and refurbishment schemes spanning across a wide range of project values. Paul has also worked across a variety of sectors including commercial, residential, healthcare and leisure in both a design and build and traditional capacity.

Paul's role is to ensure that the commercial team are operating to the highest standards and will provide strong commercial support to the wider teams both in pre-construction and during the project delivery phases.

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Paul Davis

Pre-Construction Director

Paul has a fundamental understanding of the build process drawn from over 30 years’ experience in structural Cat A refurbishments, Cat B office fit outs and unusual specialist redevelopments across London and the South East. Joining Collins at the start of 2009, initially leading the delivery of varied and complex, high quality projects, Paul now heads the pre-construction process, directing the proposals team.

Well regarded in the industry, Paul’s professional approach and balance between creativity and systems driven processes has helped Collins secure work with clients such as AXA, Aviva, Blackstone, Crown and Grosvenor Estates, Landsec and Merlin Entertainments. As well as these, many co-working providers such as FORA, TOG, Workspace and multiple and varied Cat B clients.

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Christian Pakes

Divisional Director

With over 26 years’ experience in the construction industry Christian has joined Collins to bring additional leadership, consultant process and his design experience in the Cat A & B fit out market to the pre-construction team.

As pre-construction & design director, Christian co-ordinates all aspects of the design development and tendering while ensuring the expectations of the consultants are met. This will include challenging elements of the design to suit buildability factors, programme, budget, and providing a workable solution.

With previous roles providing support to clients through leading a respected MEP consultancy, and having built strong relationships throughout the industry as a trusted advisor, Christian brings this experience and knowledge to Collins to further enhance the client team experience throughout the pre-construction phases.

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Dan Hearn

Divisional Director

Appointed as Divisional Director in 2026, Dan joins us from Mace and brings more than 25 years’ experience delivering workplace projects across London, covering base build, refurbishment and fit out.

This breadth of expertise aligns closely with our approach to delivery, from structural adaptations through to the detail and quality required at final finish.

As clients increasingly look to us to enhance their assets from the inside out – creating environments that are design-led, high quality and built to perform – Dan’s expertise further strengthens our Senior Leadership Team and reinforces what we offer across the lifecycle of a building.

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Jed Gardner

Pre-Construction Director

With over 36 years of experience in the construction industry, Jed Gardner is a specialist in fit-out and refurbishment. Since joining Collins in 2021, he has played a key role in shaping the pre-construction process, now leading the proposals team alongside Paul Davis.

Jed has built a strong reputation in the market, successfully delivering projects ranging from £5m to £180m. His expertise in communication, planning, and management ensures every project is meticulously coordinated, accurately executed, and completed on schedule.

A firm advocate for Health and Safety, Jed is dedicated to maintaining the highest standards across all projects. His commitment to excellence has seen him collaborate with prestigious clients, including The Crown Estate and The Office Group.

With a results-driven approach and extensive industry knowledge, Jed is instrumental in Collins’ continued success in delivering outstanding pre-construction solutions.

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Geoff Hall

Project Director

Geoff joined Collins as a Project Director in November 2023, bringing with him 24 years of experience in the construction industry. His career spans a variety of sectors, including new build, healthcare, education, commercial, rail, infrastructure, and logistics.

Geoff has a proven track record of leading both large and small teams and overcoming challenges to deliver projects that exceed client expectations. His dedication to excellence and collaborative approach makes him an invaluable asset to the Collins team.

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Dr Yvonne Foster

HR Lead

Yvonne has provided Collins with employment law and HR support for 12 years.

Recognising that Collins have a singular focus on being best in class has meant successfully managing a wide spectrum of risks balanced with sustaining high levels of engagement. Collins prides itself on looking after its employees by supporting their development to be masters of their craft, whatever their role is.

Yvonne works closely with the Board on developing and delivering it's people strategies to sustain Collins drive to be an employer of choice.

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Alex English

Project Director

Alex has recently joined Collins as Project Director, where he is responsible for delivering projects on time and to a high standard, while prioritising health and safety.

He started his career as a carpenter, navigating various operational roles. As a Project Director, he leverages his expertise to address challenges and find innovative solutions that benefit all stakeholders involved in projects.

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Mark Sargent

Project Director

Mark brings over 30 years of experience in project delivery and client leadership across the UK and overseas, building on a strong foundation in his trade background.

As a Project Director at Collins, Mark has played a key role in delivering standout projects such as 63-66 Coleman Street, 24 Endell Street, and Mode London. His expertise, commitment to excellence, and deep understanding of client needs make him a trusted leader within the Collins team.

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Emma Obertelli

Executive Assistant and People Lead

Emma joined Collins in 2008 as Office Manager and now works under the Board as Executive Assistant & People Lead. Emma provides comprehensive support to all senior staff. She has built a strong relationship with the team over the years and is the central hub for company information and processes, being the main point of contact for staff and client communication.

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Jon Clayden

Project Director

Jon's career in the construction industry spans over 30 years, starting out in carpentry in the early 90's he soon gained a passion for all aspects of construction and progressed into construction management gaining his honours degree and chartered membership along the way.

He has delivered a diverse range of projects during this time from Commercial office fit outs, through to universities, residential projects, hospitals and was even responsible for the construction of the Up at the O2 roofwalk over the O2 arena. He has been a CIOB Construction Manager of the Year finalist twice and brings a wealth of knowledge and experience to the Collins team.

Jon is a highly motivated team member who ensures clear, concise and transparent communication amongst all his project teams and stakeholders alike. The 4 pillars of management of Health & Safety, Quality, Programme and cost are what drives Jon forward and form the cornerstones of his management style.

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Joe Fowler

Divisional Commercial Director

Joe is a seasoned commercial leader with over 13 years of experience delivering high-profile construction projects across Central London. Known for his methodical approach and strong communication skills, he specialises in commercial strategy, cost planning, procurement, and stakeholder management on complex developments.

Passionate about building high-performing teams and mentoring emerging talent, Joe has a proven track record of driving value and mitigating risk from preconstruction through to handover. His recent work includes leading commercial delivery on landmark schemes within the city. Joe brings a practical mindset, a commitment to excellence, and a focus on achieving strong project outcomes.

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Simon Campbell

Commercial Manager

Simon joined Collins Construction five years ago as a Quantity Surveyor. He now works in Ryan Cleanthi's team as a Commercial Manager, dealing with a wide variety of commercial fit-out projects ranging from £4 Million - £20 Million.

He has been working in construction for ten years, starting his career dealing with drylining and carpentry.

As a Commercial Manager, he manages client relationships throughout the tender process and delivery of a project. He enjoys developing his team to ensure they achieve the most out of their careers.

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Neil Goff

Technical Services Director

Neil joined Collins as a TSM in 2010 and has over 25 years’ experience in the construction industry, in particular the refurbishment and fit out market. Since joining Collins, Neil has established himself as a key member of the team and in that time has developed to Technical Services Director.

As head of the Technical Services department Neil oversees a team of TSM’s, takes an active role in projects and has a personal interest in developing the next generation of Technical Services Managers.

Neil brings an assured and practical approach to every project he is involved in based on his varied knowledge and experience of the industry.

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Chris Margiotta

Divisional Commercial Director

Chris joined Collins as a Commercial Director, working in Duncan Redman's division.

Chris has worked as a Quantity Surveyor and Commercial Manager for 21 years, leading commercial teams on projects up to £250m. His strong experience in the education and residential sectors will support our growing portfolio of student accommodation schemes.

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Daisy Cassidy

Document Control Manager

Daisy has worked in the construction industry for over 10 years and joined Collins in 2022.

In her role as Document Control Manager, Daisy leads the document control team to ensure robust practices are established and applied consistently across the business, while remaining fully compliant with all relevant regulatory standards. She works closely with both document control and project teams, supporting the effective use of the EDMS system and ensuring teams have access to the right tools, guidance and training.

Where project requirements differ, Daisy adapts document control processes to suit individual needs while maintaining a reliable and compliant approach, giving project teams confidence and peace of mind throughout delivery.

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Steven Collins

Principal Planner

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Alex Weaver

Commercial Manager

Alex joined Collins 5 years ago as a Senior Quantity Surveyor and is now a Commercial Manager within Ryan Cleanthi's division.

With over 16 years of industry experience across fast-track, high-profile projects in various sectors, Alex is highly regarded for his commitment to success and proactive approach to delivering results that meet and exceed client expectations.

Alex has lead numerous successful single stage and two stage tender projects through to final account agreement. He will lead all of the financial aspects of projects and will ensure that the cost control process is managed closely between the Collins and client team.

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