Addison Project Team

Our Project business continues to grow year-on-year, with capabilities across a huge variety of disciplines. The team is highly experienced, with delivery from in-house being the foundation on which everything is built. No matter what the requirement, there is a specialist capable of helping deliver that for you.

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Lee Heron

Managing Director

Lee is Managing Director of Addison Project, leading the business’s strategic growth, client relationships and project delivery across the energy, utilities, chemicals, manufacturing and infrastructure sectors. With extensive experience in engineering consultancy and project delivery, Lee is passionate about building long-term partnerships and helping clients successfully deliver complex capital projects in highly regulated environments. Under his leadership, Addison Project continues to strengthen its reputation for safe, practical and commercially focused engineering solutions. Lee is committed to fostering a collaborative culture built on integrity, innovation and exceptional client service, ensuring Addison Project remains a trusted partner for some of the UK’s leading industrial organisations.

Dave McMahon

Operations Director

Dave joined the business in 2022 and now leads operational performance as Operations Director. An apprentice trained engineer with mechanical and electrical qualifications, he brings over 40 years’ experience across complex manufacturing environments. Dave has held senior engineering and operations roles, delivering largescale improvement and transformation programmes in Automotive, Chemical and Food & Drink sectors. He has a strong focus on operational excellence, safety, productivity and quality and is passionate about developing people and building high performance cultures. With a pragmatic, data driven approach, Dave aligns people and processes to support sustainable business growth.

Ian Dolan

Technical Director

Ian has been part of the Addison team since 2019, initially leading the Daresbury engineering design team before becoming Engineering Director and now Technical Director across the group. With over 30 years’ experience in the chemical industry as a Chartered Chemical Engineer, he brings deep industry knowledge from manufacturing, project management and engineering design. As Addison’s leading technical authority, Ian supports design teams across all four offices while working closely with clients at the earliest stages of projects, shaping scopes, developing proposals and building strong, collaborative partnerships.  His focus is on ensuring Addison delivers technically robust, wellmanaged projects.

Dean Barker

Construction Director

Part of the team since 2006, Dean initially joined the business as a construction manager and has progressed through the company to head our operations on the Construction side of the business. Whilst also providing HSE support and guidance across all disciplines from the Hillhouse office, Dean takes on the responsibility for achieving excellence in customer service, along with supporting the business on the wider growth strategy.

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Gina Peacock

Operations Manager – North East

Gina joined the business in 2020 and plays a pivotal role in supporting the continued growth and success of both the Northeast region and the wider business. Gina leads the recruitment and employee resourcing strategy, ensuring Addison attracts, retains and develops the talent required to support our clients and business objectives. She works closely with senior leadership teams, providing operational support and strategic workforce planning to meet the evolving needs of the business. Gina is passionate about building strong, long-term relationships and takes pride in delivering exceptional service, helping clients access the specialist expertise they need to successfully deliver their projects. As a strong advocate for the Northeast and the UK process sector, she is committed to driving regional growth, supporting local industry and strengthening Addison’s presence across the region while contributing to the wider success of the business.

Tim Sellicks

Business Development Manager (South)

Tim has over 30 years experience in Industry. Joining the Addison team in 2024, Tim’s remit is to expand our presence in the South. He opened up our Harlow office in Spring of 2025 and has overseen our growth in the region in securing Key strategic Framework agreements as well as new clients across Industry, building a team driven to succeed. Tim has also taken on a key National account management role with strategic clients across the business. Tim brings a wealth of commercial, technical and practical experience on projects across all manufacturing sectors, large and small. Tim’s role is very much about supporting customers and showcasing the businesses wide engineering capabilities.

Zoe Young

Business Development Manager

Zoe is a Business Development Manager at Addison Project, based in Middlesbrough, where she looks after client relationships and new business across the North East and wider UK. She began her career as an apprentice on a toptier COMAH site, gaining firsthand experience in highly regulated industrial environments before moving into business development. With strong B2B experience within engineering and technical services, Zoe works closely with clients to understand their challenges and connect them with the right expertise across the Addison group. Alongside her BD role, she supports Addison’s marketing and brand activity, helping to raise the company’s profile and showcase the depth of capability across the wider team.

Richard Horrocks

Quality Assurance Director

Following an extensive career at ICI after joining as an apprentice, Richard came on board with Addison at the very start. He recently moved across from his longstanding Engineering role to take up this new position. One of the drivers of the business that has made us the company that we are today.

Marcus Addison

Chief Executive Officer

Marcus has been a key part of the Addison Group since the Project business was established in 1997 and now leads the Group as CEO. With a strong background in contract and cost management, he brings significant commercial expertise and plays an important role in shaping major client agreements and wider business strategy. Marcus remains closely involved in the day-to-day running of the business and maintains a strong customer-facing presence across the group. He is passionate about fostering a positive culture and strong company ethos, underpinned by high standards, integrity and accountability. Marcus is also a strong advocate for sustainable business practices, ensuring that growth is delivered responsibly while supporting both our people and the long-term needs of our clients. His leadership, experience and values continue to be a driving force behind Addison’s ongoing success.

Cyril Clark

Financial Director

Cyril joined the Addison Group in March 2016 and has been a key member of the senior leadership team ever since. An FCCA-qualified accountant with over a decade of experience in senior financial leadership, he brings a wealth of commercial and strategic expertise to the business.Before joining Addison, Cyril worked as a Client Manager for a large Chartered Accountancy Practice, managing a diverse portfolio of SME clients with turnovers of up to £50 million. This broad experience across multiple industries has given him a strong commercial understanding and the ability to support sustainable business growth.As Finance Director, Cyril oversees the Group’s financial strategy, reporting and governance, ensuring the business maintains strong financial controls while supporting investment, operational performance and long-term growth. Working closely with the leadership team, he provides strategic financial insight that helps drive informed decision-making across the Group.Known for his approachable nature and attention to detail, Cyril plays a vital role in supporting the continued success and development of the Addison Group.

Emma Guthrie

HR & Learning and Development Manager

Emma joined Addison in 2022 as the HR & Learning and Development Coordinator and quickly progressed into the Group Management role, reflecting her commitment to driving positive change across the business. Since joining, Emma has played a key role in enhancing HR processes, procedures and practices, helping to create a more efficient and consistent employee experience. She also led the development of the internal Addison Academy, a structured eLearning platform that supports employee onboarding, mandatory training and ongoing professional development. Alongside overseeing the internal learning platform, she has been instrumental in the development of Addison Academy’s external training provision. With a passion for both HR and learning and development, Emma is dedicated to encouraging a positive workplace culture, supporting employee growth and ensuring people have the tools, knowledge and opportunities to succeed. She is committed to delivering fair, consistent and compliant HR practices that support both employees and the wider business.

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Sophie Addison

ESG and Marketing Director

Sophie has been a valued member of the Addison Group for many years, providing support across marketing, ESG and a range of wider business functions. With a strong creative background spanning education and marketing, she leads initiatives to enhance brand visibility across the group and plays a key role in the ongoing development of the Addison Academy. Sophie also supports wider business development activity, bringing energy, insight and a highly collaborative approach. A passionate advocate for ESG, she helps shape and promote the Group’s responsible and sustainable practices. Known for her positivity and problemsolving mindset, Sophie is committed to championing the team’s capabilities and delivering consistently high standards.