Jemma Jeffery is a British composer for media specialising in hybrid orchestral writing that is atmospheric, emotive and memorable. 

Recent screen credits include the score for When Time Flies (2026), In Harmony with Nature (2026), and the Grierson-nominated film Chasing Coexistence (2025) — all produced in partnership with the BBC Natural History Unit. 

In 2026, Jemma was selected as one of the composers on multi-award winning music agency RESISTER's Academy programme, and for Strings and Tin’s No Fixed Mix 2026 mentorship program.

She is a frequent collaborator with Westwood Instruments and The Cue Tube.

Jemma studied Music (MPhil and BA) at the University of Cambridge, receiving the William Barclay Squire Scholarship and Canon Greville Cooke Prize for musical excellence.

She is a proud member of and volunteer for the Alliance for Women Film Composers.