Leadership team

Head Teacher
Mrs Helen Cullen

BSc (Hons)
Sports and Exercise Science with Human Biology, Designated Safeguarding Lead

Mrs Cullen was educated at Leweston School in Sherborne before studying a degree in Sports and Exercise Science with Human Biology. She completed her PGCE at St Luke’s, Exeter University. With a teaching career based in the South West, Mrs Cullen has worked in schools in both Devon and Somerset, starting her career as a PE teacher before quickly progressing to middle leadership positions including Head of Year and Head of PE.

Mrs Cullen joined Sexey’s in September 2018 after being Vice Principal at Preston School in Yeovil for 10 years. During this time she was the whole school lead for Pastoral matters including safeguarding, students’ wellbeing and support, student achievement and vulnerable students. Having been a SENDCo for 8 years Mrs Cullen is passionate about inclusion and ensuring education is accessible for all students and that no student is disadvantaged by opportunity or resource. She is Designated Safeguarding Lead at Sexey’s.

Mrs Cullen is delighted to be leading the school & staff at Sexey’s and will be further developing the strong reputation that Sexey’s has for being a highly successful State Boarding school, with strong GCSE and A level results.



Assistant Headteacher Curriculum and Raising Standards
Mr Ross Dalzell

BSc (Hons) Mathematics with Statistics (Hertfordshire)

Mr Dalzell joined Sexey’s School in April 2019, having worked at King Arthur’s Community School as Assistant Headteacher – Curriculum and Assessment and Head of Mathematics since 2014. While there, he led on curriculum development, timetable design, examinations and data, and implemented strategies to improve students’ progress. He brings this knowledge with him to Sexey’s, along with a passion for tailoring solutions so that each student has a unique learning and development experience.

A keen traveller and sportsman, Mr Dalzell has participated in many running events, triathlons, multi-obstacle races and the round the Isle of Wight yacht race alongside building his teaching career in schools in Portsmouth, Somerset and Dorset since completing his PGCE in Mathematics at Cambridge University in 1999. He also enjoys spending family time with his wife and young daughter.


Assistant Head - Teaching and Learning
Mr Dan Glover

BSc (Loughborough)

Mr Glover was educated at Great Torrington School and North Devon College, before studying Geography at Loughborough University. He went on to undertake his PGCE at Nottingham University and his first teaching post was at Longsands Academy, St Neots, Cambridgeshire for three years. During this time he became the Head of a Key Stage Three House. An overseas position as Head of Geography at Greentsteds International School, Kenya, held for two years, allowed him the opportunity to broaden both his teaching and travelling experiences.

He returned to Longsands Academy as the Head of Key Stage 4 where he had the overall responsibility for raising standards and for the pastoral support of the entire Key Stage 4 cohort. In 2016 he made the move with his family to Somerset when he was appointed Head of Geography at Sexey’s School, a role that he thoroughly enjoyed.

The experiences that he gained in Cambridgeshire, Kenya and Sexey’s allowed him the opportunity to undertake his current role of Assistant Headteacher, Teaching and Learning. He is passionate about teaching and learning and is building upon the outstanding practice that is taking place in Sexey’s with a forward-thinking and student-centred outlook in all that we do.


Boarding Manager
Mrs Amanda Davidson

Registered Nurse. Diploma in Leadership for Health and Social Care Residential Services.
Boarding Manager

Amanda is a Registered Nurse who has combined working in care home management with her passion for providing training around dementia issues for the wider public for the last decade.  Prior to this she worked as a boarding Houseparent and School Nurse.  Amanda is married to Martin, a retired BBC TV engineer and they have two grown up daughters. Amanda’s hobbies include song writing, music production and she is a self confessed Francophile, having lived with her family in the Dordogne for a number of years.


Assistant Head - Pastoral
Mr Philip Clackson

BSc (OU)
Mathematics & Safeguarding Officer

Mr Clackson joined Sexey’s in 2002 as Head of Mathematics. He also served as Housemaster of Walwin House from 2003-2008 and was a Staff Governor from 2008 – 16.

Mr Clackson became Assistant Head – Pastoral in 2016 and sits on the School’s Safeguarding Team. He is also father to four children who have all attended (or continue to attend) Sexey’s, making him well placed to understand the challenges and expectations of both secondary school students and their parents!


Business Manager
Mrs Helen Rogerson


Mrs Rogerson joined Sexey’s in 2008 and has steered the business side of the School with a firm hand ever since. A proud Northerner, she has a wicked sense of fun and is a keen walker, traveller and cook.


Director of Sixth Form
Mr John Moise