Cormack starred as Maddie in the series Maddigan’s Quest in 2006. In 2007 she starred as Dimity Rush in the television series Rude Awakenings and in 2009 she starred as Cynthia Ross in the TV series The Cult. Cormack had a recurring role as Shota in the series Legend of the Seeker from 2008 to 2010. In 2011 she starred as Kate Leigh in the television series Underbelly and from 2009 to 2013 she voiced the role of Elle-Gator in the TV series Buzzy Bee and Friends. Cormack has starred as Bea Smith in the television series Wentworth Prison since 2013 and as Scarlet Meagher in the series Rake since 2010.
