Colleen Johnson was born and raised in Cheyenne, Wyoming. She received her undergraduate degree from UTC. She went on to receive her Doctor of Veterinary Medicine degree from the University of Tennessee in 1990. She became part the team at Riverview Animal Hospital in 2000. She lives on Signal Mountain with her husband, Gary, and their menagerie of horses, dogs, cats, and chickens. In her free time she likes to read, scrapbook, and garden.