Professor Middleton, who is currently Pro Vice-Chancellor at Buckinghamshire New University and formerly Vice-Provost at Bath Spa University, will start his new role on 1 August when Waite retires after four years in the role.
He said: "I am honoured to be given the opportunity of leading the excellent team at Writtle University College as we shape the next phase of our development. I am excited by the prospect of supporting the future growth and diversification of Writtle’s work in Further and Higher Education – building on its strong networks regionally, nationally and internationally.
"I believe Writtle University College is well-placed to address the growing demand for applied and vocationally-relevant education, professional development courses offered across the full educational spectrum from Further to Higher Education. Our innovation and research work has the capacity to grow and develop in partnership with others.
"With the recent increase in student applications for many of our courses, achieving Taught Degree Awarding Powers and University College status, we are in a strong position to achieve our long-term strategic ambitions.
"I am very much looking forward to meeting new colleagues and current students, welcoming the new intake of students this autumn and getting to know our partners and supporters in Essex and beyond."