At Complii, our strength lies in our people. Our leadership team brings together decades of hands-on experience in safety and regulatory compliance with a clear vision for the future of the industry. Practical, knowledgeable, and committed to doing things the right way, they set the standard for how we work, leading with integrity, collaboration, and a relentless focus on keeping people and businesses safe.
Meet the team.
Mark Davies
Chairman at Complii
Mark has over 40 years’ experience building B2B service companies in compliance and safety.
Mark Davies
Chairman at Complii
As Chairman of Complii, Mark brings extensive leadership experience from the fire and security, health and safety, and environmental sectors. He has built and scaled businesses both in the UK and internationally, guiding teams with a focus on sustainable growth and long-term value.
Sarah Dixon
Chief Executive Officer at Complii
Sarah has 25 years’ experience leading compliance businesses and championing diversity in the industry.
Sarah Dixon
Chief Executive Officer at Complii
As CEO of Complii, Sarah draws on her background across fire, security, lift, escalator, and access sectors. She has led businesses of all sizes, successfully completed and integrated multiple acquisitions, and is a strong advocate for diversity and inclusion, speaking regularly to drive change across the industry.
Brian Reynolds
Chief Finance Officer at Complii
Brian has over 35 years’ financial leadership experience, mainly within the TICC sector.
Brian Reynolds
Chief Finance Officer at Complii
As Chief Finance Officer at Complii, Brian brings deep expertise from across testing, inspection, certification, and compliance. He has spent much of his career working with private equity-backed businesses, where he has led and developed high-performing teams and delivered growth both organically and through mergers and acquisitions.
Mark Baldwin
Chief Technology Officer at Complii
As Chief Technology Officer at Complii, Mark Baldwin leads the group’s technology strategy, focusing on enterprise transformation and the seamless integration of a rapidly expanding portfolio.
Mark Baldwin
Chief Technology Officer at Complii
As Chief Technology Officer at Complii, Mark Baldwin leads the group’s technology strategy, focusing on enterprise transformation and the seamless integration of a rapidly expanding portfolio. With a professional background defined by the successful IT integration of over 30 acquisition deals, Mark brings extensive experience in managing multi-million-pound portfolios and modernising infrastructure.
He is dedicated to strengthening governance and reducing cyber risk while ensuring platforms scale effectively. A pragmatic leader, Mark bridges the gap between technical excellence and executive leadership to drive resilient digital transformation.
Martin Truscott
Commercial Sales Director at Complii
Martin Truscott is responsible for leading Complii's commercial strategy and driving sustainable growth across its portfolio of specialist businesses.
Martin Truscott
Commercial Sales Director at Complii
Martin Truscott is the Group Commercial Sales Director at Complii, responsible for leading the group’s commercial strategy and driving sustainable growth across its portfolio of specialist businesses. His focus is on building a unified, high-performing commercial framework that supports Complii’s long-term ambitions and strengthens its market position. In his role, Martin oversees all aspects of sales strategy, revenue generation, and customer engagement, ensuring commercial excellence across the group
Sharon Fleming
Transformation Director at Complii
Sharon Fleming leads the operational execution of Complii’s ambitious "buy and build" strategy.
Sharon Fleming
Transformation Director at Complii
Sharon Fleming leads the operational execution of Complii’s ambitious "buy and build" strategy. In her role as Transformation Director, she is responsible for integrating all newly acquired specialist businesses, ensuring their smooth and successful transition into the group's unified national platform. Sharon brings extensive experience from the fire and security industry, using her expertise to guide the owners and teams of new companies through change. Her role is crucial in driving sustainable growth and ensuring operational excellence across the group.
Jonathan Davies
Investment Director at Complii
As Investment Director, Jonathan Davies focuses on finding the right businesses that are a strong fit for the group – culturally, operationally, and strategically.
Jonathan Davies
Investment Director at Complii
As Investment Director, Jonathan Davies focuses on finding the right businesses that are a strong fit for the group – culturally, operationally, and strategically. He supports owners throughout the acquisition process, ensuring a smooth and collaborative journey from first conversation to completion. Once onboard, he works closely with each business to make sure they have the backing and resources needed to help unlock growth and long-term success.
John Barnacle-Bowd
Group SHEQ and ESG Director at Complii
John Barnacle-Bowd is the Group SHEQ and ESG Director at Complii, leading our commitment to excellence in these critical areas.
John Barnacle-Bowd
Group SHEQ and ESG Director at Complii
John Barnacle-Bowd is the Group SHEQ and ESG Director at Complii, leading our commitment to excellence in these critical areas. He brings a distinguished career in global Environment, Health, and Safety leadership from previous senior roles. An experienced and results-focused leader, John has extensive expertise in developing robust management systems and driving initiatives that engage the workforce. His role is instrumental ensuring compliance and continuous improvement.
Scott McKay
Managing Director – Fire Division at Complii
Scott McKay leads Complii's Fire division as Managing Director. He is a seasoned operator with over 25 years of industry experience, having started his career as an apprentice.
Scott McKay
Managing Director – Fire Division at Complii
Scott McKay leads Complii's Fire division as Managing Director. He is a seasoned operator with over 25 years of industry experience, having started his career as an apprentice. This ground-up journey provides him with deep operational and commercial insight. Scott is renowned for driving business transformation and sustainable growth, with a strong history of managing large-scale P&L operations and consolidating businesses. His strategic focus is on strengthening market presence, streamlining operations, and enabling long-term expansion for the division.
Kate Gard
Managing Director - Water Division at Complii
As Managing Director of Complii’s water division, Kate Gard leads strategic growth and drives operational excellence across the sector.
Kate Gard
Managing Director - Water Division at Complii
As Managing Director of Complii’s water division, Kate Gard leads strategic growth and drives operational excellence across the sector. Her leadership focuses on creating a cohesive, high-performance culture that prioritises both customer satisfaction and employee engagement.
By simplifying complex processes and aligning business operations, Kate ensures the division delivers scalable success. With a unique blend of commercial acumen and proven operational experience, she is dedicated to fostering meaningful collaboration and maintaining the technical excellence essential to mission-critical water compliance.
Colin Lang
Managing Director – Electrical Division at Complii
As Managing Director of Compii’s Electrical division, Colin Lang is responsible for leading the division’s strategic growth, operational excellence, and the harmonisation of service delivery nationwide.
Colin Lang
Managing Director – Electrical Division at Complii
As Managing Director of Complii’s Electrical division, Colin Lang is responsible for leading the division’s strategic growth, operational excellence, and the harmonisation of service delivery nationwide. With a career spanning over two decades, he gained the deep, hands-on knowledge required to lead the entire electrical division, starting with an electrical apprenticeship. Colin’s focus is on delivering the best quality job every time and building a reputation for long-term relationships and partnerships with our customers.
Peter Millham
Managing Director - Air Division at Complii
As Managing Director of Air and Water Systems Engineering, Peter Millham is responsible for driving the growth of Complii’s Air division while leading PH Water and Air Technologies.
Peter Millham
Managing Director - Air Division at Complii
As Managing Director of Air and Water Systems Engineering, Peter Millham is responsible for driving the growth of Complii’s Air division while leading PH Water and Air Technologies. In this dual capacity, Peter focuses on expanding the group's market presence in air hygiene and ventilation solutions while maintaining high-standard delivery of specialist water projects.
With a career defined by a passion for environmental solutions, he is dedicated to driving technical excellence and fostering collaborative growth across these mission-critical engineering sectors.