School Leadership Team

The School Leadership Team identify priorities for the year through the School Development Plan (SDP) which informs arrangements for staff training, development of curriculum areas, and assessing pupil progress.


Julie O'Sullivan, HeadteacherDr. Julie O’Sullivan, Headteacher

Dr. Julie O’Sullivan is Headteacher at TreeHouse School, having joined in 2007. Before that, she was Special Educational Needs Co-ordinator at the north London comprehensive, Fortismere School, for seven years. Julie originally trained to teach Music and started her career as a secondary school music teacher.



Katy Lee, Principal ABA ConsultantKaty Lee, Principal ABA Consultant

Katy Lee is the Principal ABA Consultant at TreeHouse School where she oversees the implementation and development of ABA. Katy has been working in the field of autism education and Applied Behaviour Analysis (ABA) for the past 14 years. She holds a science degree in psychology and behavioural sciences, a post graduate degree in developmental disabilities and has completed an MSc in Applied Behaviour Analysis. Katy is certified by the international Behaviour Analyst Certification Board (BACB) and is currently completing PhD research within the field of ABA based educational interventions for children and young people with autism and complex needs.


Becky Jones, Deputy HeadBecky Jones, Deputy Headteacher

As the Deputy Headteacher at TreeHouse School, Becky is responsible for the curriculum. Becky has 14 years’ experience working with children, young people and adults with learning difficulties. Her work has covered various settings, including respite care centres, residential homes for children with autism, holiday camps and family homes. A qualified teacher, she has previously worked in mainstream schools. Becky's past roles have included Humanities and English teacher, Nurture Group Teacher (meeting special educational needs within a mainstream setting) and Special Educational Needs Coordinator.


Wider Leadership Team

The School Leadership Team are supported by the Wider Leadership Team in the management of the school. This is made up of:

  • Emma Douglas – Senior ABA Consultant, Phase 1
  • Emilie Dyer – Curriculum Manager, Phase 1
  • Esther Thomas – Senior ABA Consultant, Phase 2
  • Laura Brind – Curriculum Manager, Phase 2
  • Andrew Swartfigure – Senior ABA Consultant, Phase 3
  • Megan Lloyd – Curriculum Manager, Phase 3
  • Belinda Blank – Transition Liaison Officer