He is known for his roles as West in the dance drama The Next Step (2013–2019), as Seven Carter in the American drama film The Hate U Give (2018), as Charlie in All the Bright Places (2020), and as Henry Burrell in The Last of Us.

[1][2] He won the Canadian Screen Award for Best Lead Performance in a Film at the 11th Canadian Screen Awards in 2023, for his performance as Michael in the film Brother.

He is a skilled dancer and is self-taught, although he was later trained at the Canadian School of Dance.

Johnson rose to fame in the hit show The Next Step as hip hop dancer West, after several bit-parts and minor appearances.

For his role in The Last of Us as Henry Burrell, Johnson received a nomination for the Primetime Emmy Award for Outstanding Guest Actor in a Drama Series.