From there he started his career in New York advertising companies, creating music for ringtones and liquor commercials.
He won the BMI Foundation's Pete Carpenter Fellowship and moved to Los Angeles where he began writing music for major films.
[1] In 2017, Fleming co-composed the BBC series Blue Planet II (2017) alongside Hans Zimmer, starting a collaborative relationship that saw Fleming contribute to films like The Lion King (2019), Dune (2021), and Top Gun: Maverick (2022), and co-compose films together such as Hillbilly Elegy, The Unforgivable, and The Night Logan Woke Up.
[6] In 2024, Fleming scored projects including Mr. & Mrs. Smith and Jim Henson Idea Man, for which he was nominated for Primetime Emmy Awards for Outstanding Music Composition for a Series and Outstanding Music Composition for a Documentary Series or Special, respectively.
Lead actor Donald Glover guided Fleming's score to focus on trust and the relationship between the characters.