Townend has worked for Mullins since he was just fifteen years of age, beginning his career as an apprentice flat racing jockey.
In 2019 he gave Willie Mullins his first Cheltenham Gold Cup winner with Al Boum Photo and he repeated this success in 2020.
Townend's first cousin, David Condon, was a jockey in Willie Mullins’ yard at the time, and he took Paul under his wing.
[6] In the 2011 Fred Winter Juvenile Novices' Handicap Hurdle he rode What a Charm to get his first Cheltenham Festival winner.
Later in March Townend then rode his 100th Irish winner of the season in Clonmel to move further ahead of his nearest rival Rachael Blackmore.
In April 2024, Townend and Mullins won the Randox Grand National with the favourite, I Am Maximus, owned by JP McManus.