Jr Bourne got his start in acting at the age of 8 in the Calgary-shot, 13 part series Parent Puzzle but his reel career didn't begin until the age of 25. Fresh out of first year Ryerson Theatre School, he landed a small part on Family Passions. That small part grew into 15 episodes and an instant start in show business. Later the same summer, he booked his first starring role in the feature film Jungleground.

Shortly after finishing shooting, he moved to Vancouver, B.C.. He soon got a role on the TV series Strange Luck. Soon to follow were roles on The Sentinel, Millenium and Two. Next he was given the recurring role of 'Elliot' on Madison. Not long after, Bourne started booking guest starring roles on such TV shows as The Crow, Showtime's Dead Man's Gun, Higher Ground, Call of the Wild and MGM's Outer Limits. From there Bourne had starring roles in many M.O.W.'s, including Showtime's The Inspectors, ABC's Futuresport and the CBS mini-series Aftershock: Earthquake in New York City.

Jr has gone on to several recurring roles on some of TV's most popular shows. He is most well known as 'Martouf' on MGM's Stargate SG-1, a character portrayal that has garnered him a legion of international fans. He also plays 'Matt Palladin' on Bravo's Beggars and Choosers and , most recently, he's brought to life the role of 'Bobby Talisman' on the new television series, Big Sound.