Since graduating from the National Film & Television School in 2018, Seymour’s work has featured in projects for Netflix, BBC Film, Microsoft, Tate Britain, and The National Gallery.

Recent film highlights include scoring Mdhamari Á Nkemi's multi-award-winning sci-fi Original Skin & sound-designing Jess O'Kane's comedy horror Hey Sexy!, slated for release in 2025.

Podcast composing credits include true crime series Crypto Kingpins & co-composing the music for occult horror series The Sisters: Undertow which was nominated for Best Original Music Score at the 2024 Webby Awards.

Also a prolific composer & sound designer for contemporary dance beginning with James Cousins’ Within Her Eyes—2012 winner of Matthew Bourne’s New Adventures in Choreography Award—Seymour has also worked with acclaimed choreographers Ihsan Rustem, Tony Adigun & Laura Obiols.

He is currently in the final stages of sound mixing Nichola Bruce’s documentary feature Some Things I Know About My Mother—an intimate portrait of her visionary artist mother, Jacqueline Stanley—and preparing to compose the score for The Last Puppet Show, a documentary feature about his own father: poet, puppeteer and punk icon Ted Milton.

2025 also marks the debut of his project The After Before—a cinematic blend of electronica & experimental sound design—featuring artists 98 Poly, Ade Otomayo (Amy Winehouse, Gorillaz), & Jah Wobble (PiL).