Senior Leadership Team

Find out more about the IB Senior Leadership Team (SLT).

Ali Ayub – Chief Digital Officer

Ali Ayub

Ali Ayub joined the IB in July 2017 and is based out of the IB Global Centre, Washington DC. He has over 25 years of experience in the information technology industry with 15 years of experience as senior executive focused on supporting and growing multiple lines of business. Ali has extensive experience with technology, service providers, cloud, private equity and the financial services industry. He has worked for IBM, Alliance Data Systems, SoftLayer, Nationstar and Caliber Home Loans. Ali holds a Bachelor's in Computer Science from Minnesota State University.

As Chief Digital Officer, Ali leads a team of over 100 people across all IB Global Centers internationally, covering Core Digital Applications, Enterprise Architecture, DevOps, Infrastructure and Operations, Project Management Office, Information Security and Risk.

Alongside a personal passion for digital innovation, a subject on which Ali has published a range of publications and books, he also takes a keen interest in cricket and tennis.

Dr Anton Béguin – Chief Assessment Officer

Dr Anton Béguin

Dr Anton Béguin joined the IB in January 2021 as Chief Assessment Officer. Anton brings with him a wealth of experience in assessment as well as research and innovation in assessment. He spent the past 20 years at Cito, where he started as senior research scientist and worked his way up to become Director of National Examinations and Tests. His department worked on the development and construction of the Dutch central tests in primary and secondary education, as well as exams and practical tests in vocational education. He has also collaborated in several research projects on quality of assessment, standard setting and evaluation.

Anton worked together with a large variety of national and international assessment research groups, universities, government entities and organizations. In addition, he serves as a Fellow of the Association for Educational Assessment (AEA) – Europe, and as a member and advisor to multiple boards, committees and societies.

Anton holds a PhD from the University of Twente in the Netherlands and is an active academic who is frequently published.

Thaimur Changezi – Chief Financial and Business Officer

Thaimur Changezi

Thaimur Changezi joined the IB in June 2016 as Director of Finance and Procurement in the IB Global Centre in Singapore. He has over 21 years of experience in finance, and brings a wealth of knowledge to his role at the IB. Thaimur has worked in the private sector in the Middle East, Europe, the US, and Asia Pacific, in areas ranging from business development and manufacturing to oil and gas. He holds a Bachelor's and Master's degree in Finance.

As Chief Financial and Business Officer, Thaimur heads a team of over 80 people spread throughout IB Global Centres all over the world, covering Commercial Publishing, Enterprise Planning, Finance, Facilities, Risk and Travel.

Sally Holloway – Deputy Director General

Sally Holloway

Sally Holloway joined the IB in August 2019 as Deputy Director General and is based out of the IB Global Centre in Cardiff. She has almost 30 years of experience working in international education and 21 years as Head of an IB continuum school. As an IB Head, she served on the IB Asia Pacific Regional Council as well as the Heads Council, the latter of which she Chaired in 2009-10. She was a member of the IB Board of Governors from 2011-17.

Sally is looking forward to bringing her extensive experience to her new role and the IB’s “School’s First” and “Student Centred” strategy.

Sally has a degree in education and a master’s degree in International Education from Oxford Brookes University.