[3] Walsh was encouraged to apply for the position of a MuchMusic VJ by one of the channel's producer while waiting tables in Hudson, Quebec.
[3] Walsh made appearances on TV shows such as Smallville, Veronica Mars, and also had a minor role in the film Disturbia.
[6] She had a small role in the movie "Stardom (2000)" playing an overenthusiastic VJ on a parody of the Canadian music channel MuchMusic.
After moving to Los Angeles, Walsh got a starring role in the ABC mid-season replacement Sons & Daughters, which premiered in March 2006.
[11] In 2017, she appeared in the second season of Dirk Gently's Holistic Detective Agency in the central role of Suzie Boreton.
[15] Walsh became one of the story editors for the Canadian TV comedy Schitt's Creek and wrote one of the episodes for season 1.