Caroline joined TWI in 2025 following six successful years as Chief Executive Officer of The Chartered Institute of Building. Her experience of leading a professional institute built upon years of experience gained as the Chief Operating Officer at Make UK. She has also been Executive Director and International HR Director at EEF and Ransomes, accordingly. With expertise in both human resources and change management, allied with experience of leading within industry, Caroline has also been a Visiting Professor of Global Engagement and Transformation (Built Environment) at Loughborough University, and a Trustee Director of The Chartered Institute of Export and International Trade.
David Wrathmall
Executive Director
David Wrathmall is a graduate of University College London and a Chartered Management Accountant who has held c-level positions with broad operational remits over the last 16 years. He has worked across Europe and emerging markets, including with internationally listed companies in digital technologies, telecoms, financial services, and the research and education sectors. David has recent experience of delivering cross-border organisational restructuring programmes, including mergers and corporate restructuring, and served as Director on the main board of The Welding Institute from 2020 to 2023, whilst also chairing its Audit Committee. David was appointed as the interim Chief Executive of TWI from April 2024 to June 2025 and is currently providing transitional support to the organisation’s leadership.
Leonie Stewart
Director of Finance and Legal
Leonie joined TWI in 2019 as Business Transformation Project Manager, where she helped to implement a programme of change to prepare the business for future growth.
She has spent 26 years working in finance and operations, half of this time at Global FD and CFO level. She has worked in the USA, Middle East, Europe and Asia Pacific regions, predominantly with high growth companies in the financial markets and IT sectors. Leonie is a contributor and guest lecturer on the ‘Entrepreneurship for Physicists’ course at Imperial College, London.
Paul Woollin
Director of Research and Quality Assurance
Paul joined the Materials Department at TWI in 1992, earlier graduating and gaining a doctorate from the University of Cambridge. He specialises in the metallurgy, weldability and weld properties of stainless steels and nickel alloys. In 2000, he became Head of the Materials Department and was appointed Director of Research in 2010.
Malcolm Lee
Director of Technology
Malcolm joined TWI in 2025, with over 20 years of experience built up working with a range of key industry names. A senior business leader with a proven international track record leading global teams and working with CEOs and their leadership teams to deliver high impact and innovative business transformation in complex engineering and technology businesses, Malcolm is also a Member of the Institute of Engineering and Technology (MIET).
Jason Gregory
Director of Training and Skills
Jason joined TWI in 2025, bringing over 20 years of experience in the education sector. With a proven track-record that saw consistent growth in vocational products, Jason has developed and implemented commercial strategies for a wide range of education products and services and holds non-executive director positions with the University of Birmingham and Save the Children International.
Serkan Canpolat
Chief Risk Officer (CRO)
Serkan joined TWI in 2025 to oversee risk management across The Welding Institute / TWI. He brings a broad international background in risk management, governance, audit, and operations, with more than two decades of experience in senior roles at B.P. and, more recently, advising organisations on business transformation, risk management, and resilience.