Having started his career in education as the youngest ever housemaster at The Doon School, Dehradun, Mr. Kapur went on to join the British School, New Delhi as Principal. He is currently the Director of the Vasant Valley School; he joined before the school began functioning. He was responsible for setting up the school, designing and implementing processes, procedures, logistics, staffing plans and management systems.
The hallmark of his success was the fact that a school, which was started from scratch, operated like a well-established institution from the very first day on the ethos of open-mindedness, constant learning and adaptation. There was no experimentation with the children. As the head of an 1160 strong institution; he used the collective wisdom of teachers coming from very varied teaching backgrounds to incorporate composite teaching methodologies.
It is a source of pride and deep satisfaction that in a short span of time, the Vasant Valley School became, and remains, amongst the most sought after institutions in the country.
As Executive Director of Learn Today, the Learning Division of The India Today Group, he conceptualised a learning-and-testing portal to bring quality education within the reach of students across India. Learn Today also advises on setting up new schools, which are centres of excellence, across the country
In 1995, he set up, and currently is, the Chairman of a registered trust: Ritinjali. Ritinjali is a non-governmental organization that is a vehicle for community development, through education and constructive work among marginalized societies across India. Children’s shelters, schools and vocational programmes, libraries and community development programmes form the core focus of Ritinjali through extensive volunteer networks. In Rajasthan, under his guidance, Ritinjali has trained around 2000 government teachers in life skills education for a period of 10 days.
He is actively engaged in building learning environments catering to a diverse group of learners—mentally challenged, physically challenged, rural and urban—across India.
In 2002, he established Pallavan, an early childhood development programme for children.
Arun Kapur also continues to contribute in multiple forums on improving education policy and planning, including serving on CII's National Committee on Education, MHRD’s Committee on School Leadership Programme, Kendriya Vidyalaya Sangathan, Punjab Education Development Board, NIIT University and so on. He is the author of the acclaimed book, Transforming Schools: Empowering Children, which outlines the importance of a child-centred, dynamic approach to creating a "great school" along with an abundance of resources for directing a school on this journey for all the stakeholders - students, teachers, administrators and parents.