He primarily plays guitar and has been a member of the bands It Bites, Arena, Frost*, Kino, A, The Urbane, and Asia, as well as pursuing a solo career with the Lonely Robot project.

Mitchell describes seeing Eric Clapton perform the song "Miss You" from his 1986 album August at a Prince's Trust concert as "the single defining moment that made me decide to put down the violin and pick up a guitar".

[3] Influenced by guitarists such as Jeff Beck, Trevor Rabin and David Gilmour,[1] Mitchell mainly sings and plays guitar, but is also a multi-instrumentalist.

[5] and featured a number of guest artists including Peter Cox, Steve Hogarth, Jem Godfrey, Nik Kershaw, and British actor Lee Ingleby.

In 2012, Mitchell toured with Martin Barre in his band "New Day", singing lead vocals on many songs by Jethro Tull.