TEAM

Tamsin Lejeune

Founder and CEO

Tamsin is passionate about the power of technology to drive coordinated action across industry. For over two decades she has built sustainable business movements powered by tech and forged alliances with leading organisations and UN bodies to accelerate impact. In 2024 Tamsin was awarded Tech Entrepreneur for Europe by Globant and in 2025 received the Industry Changemaker Award from Drapers.

Andy Showell-Rogers

CIO

As Chief Impact Officer of CO Tech, Andy is responsible for translating ideas into tech solutions that drive change. He has successfully launched a raft of innovative products that strengthen collaboration and improve responsible business practice across networks. Before CO, Andy co-founded a fair trade factory and brand group, grounding his leadership in hands-on experience.

Ben Ramsden

Partnerships

Ben is a specialist in coordinating diverse stakeholders, drawing on 20 years’ experience designing collaborations that deliver impact at scale. He has led complex, multi-country initiatives for Digital Catapult and major international development agencies. At CO Tech, Ben leads partnerships that align diverse actors and drive systems-level progress.

Steven Langley

Systems Architect

Steven heads up CO's tech partner agency and leads the development of CO's tech platforms and solutions. A systems and database genius, he thinks outside the box to find the simplest, most efficient and elegant solutions to complex challenges.

Michelle Davey

Project Manager

Michelle is highly skilled in organisation and detail-oriented project management, consistently delivering complex initiatives on time and within budget. Her leadership and proactive problem-solving allow the team to focus on creating high-quality solutions that meet user needs.

Richard Lyth

Design and UX

Richard has over a decade of experience creating user-centric interfaces that meet business goals. Passionate about design and trends, he ensures platforms remain engaging and relevant, balancing aesthetics with functionality to deliver exceptional user experiences.

Damien Fisher

Lead Developer

Damian excels in developing innovative software solutions. His coding skills and passion contribute to the team's success. Proficient in several programming languages and methodologies, he builds robust online platforms that effectively address user challenges.

Shamini Dhana

Advisor

Shamini is a cross-sector leader with 20+ years driving social and environmental innovation across government, finance, tech, and global operations. A pioneer in ESG and circularity, she founded B-Corp Dhana Inc. and created D/Sphere, an AI platform advancing circular business.

Greg Tufnell

NED

Formerly MD at Boxfresh, Arcadia, and Mothercare, and a Director at Next, Greg has decades of experience in leadership roles. In 2013 Greg Co-Founded Prime Advantage Capital Partners, focusing on helping SMEs achieve rapid growth.