In 2015, Toussaint-White appeared as Tree in The Etienne Sisters at the Theatre Royal Stratford East. For this performance she was nominated for Best Performance in a Musical in the 2016 UK Theatre Awards alongside her co-cast members Allyson Ava-Brown and Jennifer Saayeng. In September 2016, Toussaint-White appeared as Jane alongside Dominic Cooper and Ophelia Lovibond in the revival of The Libertine by Stephen Jeffreys at the Theatre Royal Bath. In 2018, Toussaint-White appeared in the BBC One show Bodyguard, a six part drama created and written by Jed Mercurio. Starring opposite Richard Madden and Keeley Hawes, Toussaint-White portrayed DS Louise Rayburn. In December 2021, Toussaint-White was cast in the action film Kandahar directed by Ric Roman Waugh.