Callum has been acting in film and television since the age of 8 when he was cast as James Ginsburg, Justice Ruth Bader Ginsburg's son in Focus' Feature Biopic "On The Basis Of Sex". Along side Felicity Jones, Armie Hammer, Cailee Spaney. Callum since, can be seen in popular Netflix movies: "Polar" and "The Silence". As well as renowned TV series: Amazon's "The Boys", CBC's "AnnE", "Kim's Convenience" and PBS "Odd Squad". Also reoccurring in season 1 of Fox 21's notable TV mini series "The HOTZONE" He can be seen in TV Movies on CBC GEM "A Christmas Letter", LifeTime network's "Toying with the Holidays" and Hallmark's "Noel Next Door", of which he plays lead roles. And see him weekly on BBC/YTV's TV series "Popularity Papers" as Mike.

No stranger to the voice-over and animation world, Callum has played numerous characters in current and past seasons on many networks. Performing leads in series playing; "Romeo" in PJ Masks (Disney Jr/ EOne), "Prince Wednesday" in Daniel Tiger's Neighbourhood (Fred Rogers Productions/PBS) "Scooch Pooch", in Go, Dog, Go! (Dreamworks/Netflix). Reoccurring supporting characters: "The Copy Cat" on Paw Patrol, (Nickelodeon) "Slater" on Corn & Peg, (Nick Jr) "Bubba" Kingdom Force (Universal Kids). Additionally, he can be heard voicing many characters on: the Pikwik Pack (Disney Jr), Mighty Express (Netflix), Elinor Wonders Why (PBS Jr), Xavier Riddle and Wild Kratts (9Story Media). Most notably Callum voices "Rocky" on the Big Screen in the 2021 feature film Paw Patrol:The Movie (Paramount/Nickelodeon). And returned to reprise his role as Rocky in the sequel "Paw Patrol:The Mighty Movie" in the fall of 2023. Catch him in the upcoming Sony Pictures' 2024 TV series; The Pradeeps of Pittsburgh on Amazon Freevee.