Van Horne began his broadcasting career on CKMP in Midland, Ontario, in 1971. From 1972 to 1980, Van Horne was one of the top disc jockeys in Canada at 1050 CHUM in Toronto. He was named Billboard Magazine's Disc Jockey of the year in 1972, the only Canadian to ever claim the honour. From 1980 to 1984, he was the late night sports anchor for CFAC television in Calgary, while hosting the Calgary Flames' NHL broadcasts.
He moved on to a long career with TSN where he was a sportsanchor from the beginning of that sports network's history in 1984 until 2001. During his time on TSN, he covered numerous events including NHL hockey, alpine skiing, boxing, tennis, swimming, bowling, golf, and equestrian. Currently Van Horne is pursuing freelance opportunities that include the Calgary Stampede Rodeo, and Rogers Cup women's tennis in Toronto for the CBC.
Van Horne has broadcast from four Olympic games, including 1988 in Calgary, covering alpine skiing, 2000 in Sydney covering tennis, 2008 in Beijing, assigned to baseball and softball, and 2010 Vancouver, mentoring the commentators from APTN, the Aboriginal Peoples Television Network.
Van Horne is also the television co-ordinator at the College of Sports Media. He also hosts Champions of Conservation and Nature Bites on Oasis HD channel.