Mark was on RoundHouse for all 4 seasons. He has an incredible voice and is a very good dancer. He played "Princable Bose" " President Bush"  "The Encyclopedia kid" " Barney Fife" and "Speed Racer" parodies.

He danced in Janet Jacksons "Alright" video. He played "Specs" in the movie " Newsies" and he appeared on a few episodes of "Hull High."

Mark hosted an MTV Top 20 countdown in 1993. Hosted SNICK Live with the 4^th season cast. Appeared on Entertainment Tonight with the 2nd season cast.