Creaghan has created original scores for the web series Teenagers, television series such as SurrealEstate, and feature films such as Black Water (2018), Quickening (2021), Motherly (2021), and I Don't Know Who You Are (2023), the latter of which premiered at the 2023 Toronto International Film Festival.

He is also an alumnus of the Slaight Family Music Lab at the Canadian Film Centre.

In 2022, Creaghan received a Canadian Screen Award nomination for Best Original Score at the 10th Canadian Screen Awards for his work on the 2021 film Motherly.

[1][3] The film received acclaim from critics and was released theatrically in 2024.

[8][9] He has also composed orchestral parts for symphonic metal bands, including Carnifex, Aborted, Devilment, Astaroth, Diamorte, and Lindsay Schoolcraft.