Paul Breckell has been appointed deputy chief executive of Ambitious about Autism.
He said at the time he wanted a role that would give him the flexibility to deal with additional caring responsibilities in his family.
He had been at Action on Hearing Loss for 11 years, including six as chief executive.
Breckell is honorary treasurer of the National Council for Voluntary Organisations and part of the panel that has been charged with selecting a replacement for chief executive Sir Stuart Etherington, who will retire later this year.
Jolanta Lasota, chief executive of Ambitious about Autism, said Breckell’s "wealth of experience and knowledge of the charity sector" would help her organisation move forward.
Breckell said he had been impressed by the commitment and integrity of the charity’s staff, trustees and supporters since joining last year.
"I’m very excited about the opportunity to help the charity extend the reach and impact of the education services it delivers for children and young people with autism and to support the ongoing transformation of the charity as it grows," he said.
The charity provides services for children and young people with autism, including the TreeHouse School, works to raise awareness and understanding, and campaigns for change.