The head teacher of Castle Rushen High School had announced he will leaving the school next month after 12 years in charge.
In a email sent to parents and carers this week, Keith Winstanley said the school had been an important part of his life for so long but believed the time was right to move on.
His final day will be on November 6.
Deputy headteacher, Nicola Kennedy, will take on the position of acting headteacher until the end of the academic year.
Mr Winstanley told parents: ‘After 12 years, this is not an easy message to write. It has been a genuine honour and privilege to lead such a dedicated team and to serve the young people and families of the south of the island.
‘Throughout that time, I have been fortunate to see our school community grow and develop, and to share in many achievements, challenges and memorable moments.
‘Due to current personal circumstances, I believe that now is the right time for me to move on. This has been a carefully considered decision, made with the needs of my family in mind and with a great deal of respect for the school that has been such an important part of my life for so long.’
‘I will remain fully committed to the school during the weeks ahead and will take CRHS through the validation process. My final day in post will be November 6, and I will do everything I can to support a smooth and positive transition.’
He added: ‘I would like to thank you sincerely for the trust, encouragement and support you have shown me over the years.
‘It has been a privilege to work in partnership with so many families and to watch generations of young people learn, grow and move on to the next stage of their lives.
‘I am immensely proud of every student who has come through CRHS, and equally proud of the staff whose commitment, care and professionalism make the school such a strong and caring community. I will leave with many fond memories and with enormous gratitude for all that we have achieved together.
‘I know that the school will be in safe and capable hands, with Mrs Kennedy taking on the position of acting headteacher until the end of the academic year. She knows CRHS and its community extremely well, and I am confident that she will lead the school with dedication and care. I know you will give her the same support that you have so generously given me.
‘Although saying goodbye will be difficult, I will always look back on my time at CRHS with great pride and affection.’
A spokesperson for the Department of Education, Sport and Culture, said: ‘We can confirm that the headteacher of Castle Rushen High School will be leaving the school in November to take up another role. We would like to thank him for his contribution to the school over the last 12 years.’