Jan Jaap Boontjes is Manager International Affairs and Strategic Advisor at the Royal Netherlands Institute of Chartered Accountants (NBA). He has extensive experience in representing the interests of the profession to a broad range of stakeholders, both nationally and internationally.

He joined the NBA in 2016 as Manager Public Affairs. From 2020 to 2022, he worked for the Dutch Ministry of Finance as a senior policy advisor, where he was involved in audit reform legislation and served as secretary to the 'Quartermasters for the Future of the Accountancy Sector.'

Mr. Lei Yan joined the IFAC Board in November 2024. He was nominated by Chinese Institute of Certified Public Accountant (CICPA).

Mr. Lei Yan is currently the leading Partner of Assurance and International Business in Baker Tilly China. He has extensive experience in auditing and consulting of large scale international operation company and IPO auditing in the Chinese capital market.

Mr. Lei Yan is a member of the SME Implementation Group of IFRS and HR development committee of CICPA to focus on the training of the talent in the industry. He is a Chinese certified public accountant.

Mr. Lei Yan received his bachelor's degree in accounting from North China Electric Power University and Master's degree in business management from Central University of Finance and Economics.

Mark Vaessen joined the IFAC Board in November 2024 after being nominated by the Royal Nederlandse Beroepsorganisatie van Accountants (The Royal Netherlands Institute of Chartered Accountants).

Mr. Vaessen is a senior partner with KPMG in the Netherlands and the Global Head of Corporate & Sustainability Reporting for KPMG internationally. In that capacity he maintains the relationship with the International Sustainability Standards Board (ISSB) and the Global Reporting Initiative (GRI) and is a member of the Integrated Reporting and Connectivity Council, an advisory body to both the ISSB and IASB.

In addition, Mr. Vaessen is currently the President of Accountancy Europe, a Brussels-based organization representing nearly one million professional accountants from across Europe. He previously also was a board member at the European Financial Reporting Advisory Group (EFRAG) and the Sustainability Accounting Standards Board (SASB).

Mr. Vaessen has been a partner in KPMG’s global audit practice since 1999. He lived and worked in London for nearly 20 years, building and leading KPMG’s global international standards network as global IFRS leader. In 2017, he returned to his native the Netherlands where he was Head of Professional Practice until the end of 2022.

Michael Niehues was elected to the IFAC Board in November 2024, jointly nominated by the Institut der Wirtschaftsprüfer (IDW) and the Wirtschaftsprüferkammer (WPK).

Mr. Niehues is currently a member of the WPK’s Board (since 2014) and of the IDW’s working group on audit and professional ethics regulation. He chaired Accountancy Europe’s Ethics & Professional Competencies Working Party (2007 to 2020), served as member of the International Ethics Standards Board for Accountants (2006 to 2011), and as National Expert to the European Commission (1999 to 2001) he worked on audit regulation and auditor independence.

Mr. Niehues is a partner at Deloitte Germany, a German certified tax advisor, and German certified public accountant. In 1989 he started his career with Deloitte Germany where he gained experience in auditing large multinational companies, corporate restructuring, and forensic services. He served as the firm’s Director of Independence and regulatory contact (2001 to 2020) before he joined its executive leadership as Chief Risk Officer (2020-2024).

Mr. Niehues holds a Diplom (MBA equivalent) in business administration from Julius-Maximilians-Universität Würzburg.

Adriana Tiron-Tudor is the Chair of Professional Accountancy Education Europe (PAEE) the former Common Content Project. The PAEE is a collaboration between European premier accountancy bodies with an aim to further develop, maintain and unify high quality professional accountancy education benchmarks reflected in the distinct qualifications of participating bodies and recognised internationally as meeting the challenges posed by globalisation and the needs of diverse stakeholders.

Adriana is an active member of the Body of Expert and Licensed Accountants (CECCAR) and of the Romanian Chamber of Financial Auditors (CAFR) and specialized trainer for professional accountants and auditors.

She is Full Professor at Babes-Bolyai University (Romania), Faculty of Economic Science and Business Administration and PhD Supervisor with more than 30 years of academic and practical experience in accounting and auditing. She is the coordinator of the accounting master program Management Accounting, Audit and Control and a member of the Romanian Agency for Quality Assurance in Higher Education. Her research focus is on integrated thinking and sustainability reporting and the issues impact of disruptive technologies on accounting profession.

Ann Lamb is the Director of Professional Qualifications at ACCA.