He replaces Caroline Skinner, who stepped down last month to join BBC Drama Production in London.
Minchin is an executive producer for BBC Wales's drama department, where he has been working on The Game, a new Cold War spy thriller from Toby Whithouse for BBC One, and Wizards vs Aliens, the Russell T Davies and Phil Ford co-creation for CBBC. He has also worked as BBC executive producer on Dirk Gently - based on the novels by Douglas Adams - and Being Human (another Whithouse creation).
He has been a script editor on Doctor Who and was a producer for spin-off series The Sarah Jane Adventures as well as the UK sections of Torchwood: Miracle Day, and was assistant producer on Torchwood: Children Of Earth.
Having grown up in Aberystwyth, Minchin joined the BBC Wales drama department in Cardiff in 2005 as a script editor working on the BBC One Wales production Belonging, before moving to network dramas Doctor Who and Torchwood in the same role.
I'm thrilled and excited to be joining Steven Moffat on a show that has meant so much to me over the years. I've watched in awe as Steven has taken Doctor Who to wild and imaginative places and I can't wait to get started on many more adventures with the Doctor.Faith Penhale, the head of drama at BBC Wales, said:
I've no doubt Doctor Who will enjoy a very exciting time with Brian at the helm working alongside Steven. Since joining BBC Wales in 2005, he's proved he has a fantastic eye for story and a sharp awareness of what makes a drama like Doctor Who unmissable.And Moffat added:
When I first took over Doctor Who, Brian was there as script editor, and in the most difficult time of a new Doctor and a new era was completely brilliant. We lost him to producing The Sarah Jane Adventures at the end of our first run. Rising talent keeps rising, is how I comforted myself back then - but now I am beyond happy that Brian has risen all the way back to Doctor Who in his new role of executive producer. I look forward to getting hopelessly lost in space and time with him.