Russell Hobby, general secretary of union NAHT, is set to take over as chief executive at Teach First.
Hobby is set to take over the social mobility charity in September when chief executive and founder Brett Wigdortz stands down.
Wigdortz announced his departure from the organisation he set up 15 years ago in January.
However, he will remain Teach First’s honorary president.
Hobby commented: "Over the last 15 years I have watched the Teach First movement grow from a handful of raw recruits to the national scale and influence it has today," he said.
"Yet it has never lost its focus on young people, their enormous potential and the power of teachers and leaders to change lives.
"I’m looking forward to building on all that has been achieved.”
Nearly two thirds of Initial Teacher Training providers believe that teachers are not currently prepared to meet the government’s ambition to raise the complexity threshold for SEND pupils entering mainstream schools.
England’s councils are warning of a "ticking time bomb" in the special educational needs and disabilities (SEND) system, with new data showing deficits that could bankrupt local authorities within three years.
The regulations have been set following a second consultation and detailed collaborative working with organisations and people across deaf and hearing communities.
The Education Committee has published a letter to the Secretary of State for Education asking for more detail about the Department for Education’s work on developing its SEND reforms.