Duncan led the PGCE in Secondary Music at the University of Sussex for twenty-one years and prior to this was a secondary classroom music teacher in West Sussex.
He held the post of Director of Teaching and Learning in the School of Education and Social Work from 2012-2016 and has served as a member of the Department for Education National Curriculum Expert Subject Advisory Group for Music.
In 2016 and again in 2018 he undertook research with Dr. Ally Daubney into changes in Secondary Music curriculum provision in schools in England which has been widely cited.
Duncan has now recently taken retirement but will continue his association with Sussex University, having been made an Honorary Senior Lecturer in Education