Annmarie McNaney - Headteacher

Annmarie has been the Headteacher at CGS since September 2015.  She joined the school as Head of Sixth Form in the late 90s before being promoted to Assistant Head and then Deputy Head, a role she held from January 2007 until her appointment as Headteacher.  During her time on the Senior Leadership Team, she has introduced several new initiatives and was the driving force behind 'CGS Learning', the school's bespoke approach to teaching and learning.  She was an integral part of the CGS journey from good to outstanding and is very proud of what was achieved in the process.  

Before moving to Chesham Grammar, Annmarie taught at Backwell School, a large, nine form entry comprehensive school just outside Bristol, where she was Assistant Head of Sixth Form.  Annmarie is a graduate of the University of Bristol where she read Theology and Sociology and where she also studied for her PGCE.  Annmarie lives in Berkhamsted and is married with two sons, both of whom joined CGS in year 7.  Her elder son left Year 13 in 2021 and the younger is currently in the Sixth Form.  

Tim Patteson - Deputy Head

Tim joined Chesham Grammar School in September 2015 having been Subject Leader of Geography at Dr Challoner's Grammar School, Amersham for four years. Prior to that, he worked at Sir John Lawes School, a mixed comprehensive in Harpenden. His current role includes responsibility for teaching and learning as well as staff professional development. He is married with two young daughters and two sons.

Hugh Bradbury - Assistant Head

Hugh joined CGS in 2012.  Prior to becoming Assistant Head, Hugh has been Subject Leader for History for the past four years and before that had led the Politics Department. As well as leading in these subject areas, Hugh has performed a number of other roles within and beyond the school as More Able and Talented Coordinator and also a Specialist Leader for Education for the ASTRA Alliance.  Within that role he has worked closely with the ASTRA SCITT, in particular delivering the subject specific training to History trainees from across the Alliance.  His primary teaching subjects at CGS are History and Politics and his main responsibilities as Assistant Head are overseeing pastoral care and supporting the wellbeing of students as the Designated Safeguarding Lead, Designated Mental Health Lead and SENDCO.  Hugh grew up in Sussex and Surrey and then went on to complete his undergraduate degree and teacher training at the University of Exeter.  He now lives in Chesham.

Sebastian Hayes - Assistant Head

Seb joined CGS in 2018 as the Subject Leader for History. Prior to joining CGS Seb started his working career on the John Lewis Graduate Development programme before changing careers and completing his teacher training at UCL.  Seb worked as a Head of History in London and taught in Madrid before joining CGS.

In 2020 Seb took on the role of Associate Assistant Head and led the schools work on recovery following the pandemic. In 2021 he joined the team in an acting capacity before taking up a permanent position in September 2023. In his substantive role he leads Teaching and Learning, Character Education and Student Leadership.

Karen Dax - Assistant Head

Karen joined CGS in 2017 after nine years at Ranelagh School in Bracknell, where she had been the Curriculum Leader for History and completed a one year Associate Assistant Headteacher programme.  She also led the Wilderness Expertise and Duke of Edinburgh programmes.  Her primary teaching subject at CGS is History and her main responsibilities as Assistant Head are for Data and Exams.  Karen was born and raised in Chesham, completing her degree in Politics and History at Brunel University.  She then moved onto the University of Oxford to complete her PGCE and then her Masters in Learning and Teaching.  Karen now lives in Sonning with her husband who is also a teacher and their son and baby daughter.

Sarah Hammond - Finance and Operations Director

Sarah joined Chesham Grammar School in July 2021 as the Schools Finance & Operations Director, having been working in similar roles over the previous 7 Years in a number of Buckinghamshire Schools, that faced very different financial challenges.  Sarah has vast Local Government finance experience, and previously was Director of Finance & Resources for two large local authority housing organisations.  She is a qualified accountant and has for a number of years been a School Governor in a local Junior School.   Sarah is married with two daughters and spends her free time managing the Girls Rugby Section at Chesham Rugby Club.