This marks a significant step forward for the AAT with the new governing structure due to start from 1 April after strong support from the membership for the changes. The existing framework had remained largely unchanged for nearly a decade.

The AAT said the move would ensure it is ‘future-ready and aligns with the enhanced standards set by the UK’s Charity Governance Code’.

Hillier will lead a new skills-based trustee board for a three-year term. As AAT’s most senior decision-making body, this board will have responsibility for governing the organisation and, in addition to the chair, will comprise 11 non-executive directors, including at least 20% who will be AAT members.

As chair of the Civil Aviation Authority (CAA) since 2020 Hillier has played a pivotal role in safeguarding aviation safety, security, and consumer interests. He also serves on the board of the UK Atomic Energy Authority, and chairs the RAF Museum board of trustees - a fitting tribute to his distinguished military career, which culminated in his appointment as chief of the air staff in the Royal Air Force.

A keen supporter of businesses, communities, and social mobility, he is dedicated to fostering collaboration, amplifying diverse voices, and championing inclusivity.

The new structure was agreed by the AAT council in April 2024 requiring significant changes to the articles of association and the scheme of delegation, which were approved by an overwhelming 95% of AAT members.

Alongside the new chair and trustee board, a members’ advisory council (MAC) will also be set up. This new body will amplify the membership voice within the new governance structure, ensuring members stay at the centre of AAT’s development. A MAC appointee will also serve on the board, linking governance and representation within the organisation.

Michael Steed, president of AAT, said: ‘Our governing structure has been in place for many years, during which time both AAT and the profession have significantly evolved. Since Sarah Beale’s appointment as CEO over three years ago, she has led the development of an ambitious 2030 strategy, ensuring AAT remains relevant and future ready.

‘As a proudly diverse accountancy membership body, we have a responsibility to our members and society to ensure our trustee board reflects a broad mix of skills, knowledge, and experience to strengthen our decision-making.

‘I am delighted to welcome Stephen as our newly appointed board chair and look forward to working together to drive AAT forward.’

Under the new structure, Steed will focus on ensuring strong governance, fostering innovation, and enhancing the support provided to members, students, and stakeholders.

Steed added: ‘By working collaboratively with the board, president, the new members’ advisory council and with the executive team, we will navigate the evolving landscape of accounting, embracing opportunities for growth and social mobility and continuing to uphold the highest standards of professionalism.’

‘I look forward to leading AAT into this exciting new chapter and ensuring that we remain a dynamic, forward-thinking organisation that empowers our members for the future.’