[3] McIntosh's most notable recurring roles in television series include Dr. Currie in the short-lived 90's medical drama Side Effects, Jenni Hernandez in Riverdale, Edna Myles in The Eleventh Hour, Dr. Rollins in Blue Murder, Zona Robinson in This is Wonderland, and Ms. Dymond in the Canadian teen drama The Best Years.
She voices Jenny the giraffe in another Canadian animated TV show called Willa's Wild Life.
Some of her appearances in movies and direct-to-video films include Nicole in Spooky House (2000), Penny Mills in Full Disclosure (2001), Teddy Vargas in The Sentinel (2006), and Diana in Finn's Girl (2007).
[5] The production was also filmed for the CBC Television series CBC Presents the Stratford Festival as Antony and Cleopatra;[6] McIntosh garnered a Canadian Screen Award nomination as best actress in a television film or miniseries at the 4th Canadian Screen Awards for the role.
In 2019, McIntosh joined the San Francisco production of Harry Potter and the Cursed Child as Hermione Granger.