[2][3] Popowich has performed in many television series, including Beverly Hills, 90210,[3] and features and theatre.
Popowich made his film debut aged 15 when he received his first professional role as Cass in the movie Tommy Tricker and the Stamp Traveller.
[4][6] He appeared in the Star Trek: Deep Space Nine episode "Valiant", as Tim Watters, a Starfleet cadet who received a field promotion to captain.
In addition, Popowich has worked on projects including Angela's Eyes (2006), I Me Wed (2007), The Bridge (2010),[7][8] Cracked (2010), and Hemlock Grove (2013).
In December 2018, Popowich portrayed Canadian detective Tom Barrow in an episode of Investigation Discovery's The Case That Haunts Me titled "Devil's Triangle".