Mann is known for his work with Oingo Boingo, Jeff Lynne and the Electric Light Orchestra.
He is a long-time collaborator with Danny Elfman in such films as the Men in Black series, Mars Attacks!, Sleepy Hollow, plus many more.
[2] In 2002, Mann made string arrangements for several songs on Harrison's posthumous Brainwashed album.
[3] On 29 November 2002, Mann performed in the "Concert for George", alongside Eric Clapton, Jeff Lynne, Billy Preston, Ringo Starr and Paul McCartney and many others,[4] playing Harrison's parts.
"[5] Since then, Mann has continued his collaboration with Lynne and Elfman, being credited for involvement in films such as Frankenweenie and Mr. Peabody & Sherman,[6] as well as providing support for bands like Thenewno2.