Robert Harrison is an accomplished education executive with a lifelong commitment to learning and teaching. He holds a PhD in Religion and Sociology from Duke University and has built a career defined by high-impact leadership across public, private, and charitable sectors around the world.
After years as a special educator and teacher leader in Washington, D.C., Robert joined the International Baccalaureate (IB) in 2010. There, he served as the first manager for global education and later as Head of Middle Years Programme (MYP) Development in The Hague. During his tenure, he led the worldwide implementation of “MYP: Next Chapter” and spearheaded the development of the innovative MYP eAssessment.
After his initial appointment in 2018 as ACS’s first Education Strategy Director, from 2022 to 2026 Robert was Director of Education and Integrated Technology. Bridging the gap between teaching and commercial operations, he helped deliver robust business systems and integrated processes that modernized the group’s infrastructure. His leadership was instrumental in establishing a comprehensive education quality framework, resulting in measurable excellence in both academic outcomes and school climate.
A frequent author, speaker, and former co-editor-in-chief of the IB Journal of Teaching Research, Robert continues to drive strategy at the intersection of curriculum design and technological transformation.
Graeme is Chief Operating Officer at ACS International Schools, with strategic responsibility for IT, HR, Marketing, Partnerships and operational delivery across the organisation. A qualified teacher with over two decades of experience in education, he brings a distinctive perspective as a senior leader who has progressed through the profession from classroom teacher to executive leadership.
Graeme began his career at Oakham School as a teacher and house parent, before joining Sevenoaks School in 2006 as Head of Department. In 2009 he became Head of Faculty for Science, where he led the development of one of the world’s largest free science events in the UK at the time. He went on to hold a number of senior leadership roles including Director of Innovation and Excellence, and Director of Outreach and Innovation, building a reputation for delivering large scale, high impact educational initiatives.
Throughout his career, Graeme has combined educational leadership with operational and strategic delivery, leading complex programmes, managing multi-disciplinary teams, and building partnerships across sectors. His work has focused on widening access to opportunity, developing innovative approaches to education, and ensuring that organisations operate effectively in support of their core mission.
In addition to his school-based leadership, Graeme has worked with OCR, AQA and the International Baccalaureate, contributing to curriculum and assessment development. He also completed a yearlong secondment at Buckingham Palace as a Special Advisor to the Royal Family in 2015.
Graeme was awarded an MBE in the Queen’s Birthday Honours 2020 for services to education. He has received multiple national awards, including the Lloyds TSB Teacher of the Year and Pearson Teacher of the Year, and was named by TES as one of the top five science teachers in the UK.
He remains passionate about social mobility and the role education plays in transforming lives, having worked with hundreds of schools, charities and international communities to create meaningful opportunities for young people.
Outside of work, Graeme enjoys climbing, motorsport and engineering projects, and spending time with his family.
Martin Hall grew up in Scotland and gained his first degree in Political Economy and Philosophy from the University of Glasgow.
He taught Economics, Business Studies, and History at highly regarded state schools in England, and then at a Tanzanian school for two years with the VSO. Martin served as Secondary Principal at the Inter-Community School of Zurich, and most recently, as Director of the International School of Tanganyika in Tanzania. He is an experienced member and co-Chair of accreditation teams and was a Board member of the Association of International Schools in Africa. Martin has a Masters in Educational Leadership from the Open University, and the National Professional Qualification for Headship.
As a school leader, Martin has continued teaching such classes as Economics and Theory of Knowledge, valuing the continued opportunity to develop his professional practice and interact directly with students. Martin is committed to the culture of excellence in schools, setting high aspirations for students and encouraging critical thinking throughout the school community. He is passionate about supporting student achievement and well-being through effective pastoral systems and nurturing student engagement.
Mark Wilson has been teaching and leading schools for over 27 years. He started his career in the UK before moving into International Education by joining Nord Anglia Education in 2009 at The British International School Shanghai as a Headteacher. Mark then moved to the US and was Head of School at The British International School of Houston.
Mark trained as a Drama teacher and has taught a range of subjects over the years at GCSE, A Level, BTEC and IBDP. He still teaches Theory of Knowledge on the IB Programme.
Inspiring others to learn and grow is one of Marks passions and throughout his career he has been privileged to be involved in teacher training, working with a variety of universities and providers including, Middlesex, Nottingham and Sunderland Universities as well as the Royal Academy of Dance. Mark was fortunate to have worked for the UK Department of Education Innovations Unit on Leadership projects. Within Nord Anglia Education he taught or coached on the NAE Middle Leaders and the NEA Senior Leaders courses and wrote and facilitated the Americas Aspiring Leaders programme.
Robert’s journey to ACS has had many stops along the way. British by birth, raised in Australia, educated in Australia and the UK and living and working internationally since 1991.
Robert’s international school career has taken him to Rome, Frankfurt, Berlin, Ho Chi Minh City and Jakarta. In that time, he has taught in Lower Schools as well as Middle School English and Mathematics and Learning Support. He has been a divisional Principal, Assistant Principal, Head of School, Curriculum Coordinator, teacher trainer and member of authorisation teams for the International Baccalaureate Organisation.
Since joining ACS in 2013, Juliet has held several senior finance roles and has played a key role in enhancing the organisation’s reporting, analysis, and business partnering capabilities. Prior to ACS, she qualified as a Chartered Accountant with the Institute of Chartered Accountants in England and Wales while working in audit across a diverse portfolio of organisations including schools, charities, and international groups.
Juliet holds a BA (Hons) in Business and Accounting from the University of Exeter and became a Fellow of the Institute of Chartered Accountants in England and Wales in 2021.
Christina is Head of HR at ACS International Schools, where she leads the HR team across HR Operations, HR Business Partnering, Reward, and Learning & Development. With extensive experience in the education sector and over three years at ACS, Christina works closely with the Leadership Team to shape and deliver the organisation’s people strategy. She provides strategic advice and support across a wide range of people and organisational matters, with a particular focus on developing our people, strengthening our culture and ensuring ACS continues to be a great place to work.
Christina has a strong background in organisational change, employee relations, workforce planning and HR transformation. Before joining ACS, she held senior HR roles within one of the UK’s largest multi-academy trusts, where she supported schools and senior leaders across a wide range of people-related priorities. She is passionate about creating inclusive, supportive and high-performing workplaces where people feel valued, engaged and able to thrive. She combines a people-focused approach with a strong understanding of organisational needs, ensuring that our people strategy supports the continued success of ACS and our educational mission.
Golnar has over 20 years of experience in education marketing, with a career spanning schools, international education groups and EdTech. Before joining ACS, she held senior marketing roles at International Schools Partnership and Alpha Plus Group, part of Inspired Education.
Throughout her career, Golnar has led marketing, brand, digital and communications strategies across a wide range of education organisations. Her work has focused on understanding what matters to families, building strong school brands and creating meaningful connections between schools and the communities they serve.
Golnar is passionate about the role education can play in shaping young people’s confidence, curiosity and outlook on the world. As a parent, and as part of an international family herself, she has a strong appreciation for the different perspectives, cultures and experiences that international education brings.
With a career defined by strategic leadership, cloud migrations, and large-scale infrastructure rebuilds, Iain combines deep technical expertise with a proven ability to mentor teams and drive organisational value, he leads the IT teams across all three campuses including service delivery, systems development, projects and DPO.
Iain’s background has seen him serve in key leadership and managerial roles across government, nuclear, construction, and global corporate sectors before taking his position in 2021 with ACS. But he maintains the moto, IT is the skeleton of any business, its function remains constant, it is the skin you wrap around it that makes it look different.
Driven by the ambition to provide world class solutions Iain is keen to deliver an experience to students, staff and parents that is not only reliable, and robust, but is one that nurtures collaboration, embraces new technology and encourages innovation.
While with ACS Iain and his team have deployed the UKs first Dell Apex HCI cluster and have been used as a global case study and video demonstrating its benefits to education.
