In 2003, Karl was one of Network Nine's US correspondents, operating out of Los Angeles . During this time he also worked for CNN.
In 2000, Karl received a Queensland Media Award for Best News Coverage for his report on the Childers backpacker hostel fire, for Network Nine.
After leaving university, Karl worked for WIN TV in Rockhampton and Cairns, in Queensland, as a cadet reporter.
Karl's brother, Peter, also majored in journalism and works for Network Nine.
In 2006, Karl reached the grand final of the reality TV show, Torvill and Dean's Dancing on Ice. He was beaten by rugby league player, Jake Wall.
In 1994, Karl graduated from the Queensland University of Technology with a degree in journalism.
Karl and his wife, Cassandra, have three children together: Jackson, Ava and River Kai.
Karl: (drawing the line at baring his chest on "Dancing On Ice") I won't take my shirt off unless I've had four days in the waxer!
Karl: (on his Today colleagues teasing while he was on "Dancing On Ice") The first thing I get in the morning is, 'What's your injury today?' or 'Are you going to wear lycra?'.
Karl: (asked if "Dancing On Ice" has made a difference to his fitness) I don't know if I've lost any weight, but my legs have things coming out of them now that look like muscles.
Karl: (his secret TV addiction) I was a big Days Of Our Lives fan. I used to rush home to watch it! And I used to know what everyone was doing.
Karl: (his favourite TV snacks) I've got a bit of a microwave popcorn fetish. The kids love it!
Karl: (on reaching the finale on 'Dancing On Ice') It's a bit of a surprise. I really didn't expect to go this far. It helps to have your own show - you can promote the hell out of yourself! [laughs]