In 2015, he provided the voice of Lofty in the American dubbed version of the 2015 reboot of the British children's animated television series Bob the Builder taking over from both Sonya Leite, Emma Tate and Lizzie Waterworth.

After graduating from Vancouver's Richmond Secondary School in 1991, he appeared in a wide variety of guest-starring roles.

By the time he was 16, he won the co-starring role in Black Stallion, opposite Mickey Rooney, where he worked for much of his youth.

He has also voiced various characters in several other anime series, including Mobile Suit Gundam (Kai Shiden), Galaxy Angel (Normad), Megaman NT Warrior (Burner Man) and Gundam SEED (Tolle Koenig and Shani Andras), as well as various American cartoon characters, such as Quicksilver in X-Men: Evolution and Snails in My Little Pony: Friendship is Magic.

For over a decade, Cox was a senior instructor of actors at Tarlington Training in Vancouver, and currently teaches film acting at South Delta Secondary School.