Twynham Learning oversees eight schools across Dorset, including Christchurch Infant School, Christchurch Junior School, Poole High School, Stourfield Infant School, Stourfield Junior School, Twynham School and Sixth Form, The Grange School and Twynham Primary School.
Twynham Learning’s chair of trustees Mike Turvey said: "After eight years’ service with the trust, Gareth Morris will be leaving to pursue new opportunities in the education sector. We thank him for his service."
The trust is looking to appoint a successor with Nick Watkiss taking on the post of interim chief executive until August next year.