After a number of years of limited success in the Junior ranks, Dupont joined Dorthe Holm's team and was a member of the silver medal winning European Curling Championships team in 2002. (Throwing second rocks). The following year, the team won a bronze medal. Her success at the European Championships never translated to Junior success or World Championship success at the time. In 2004, she was promoted to the third position, and the team won another bronze at the European Championships in 2005. She played third in the 2006 Olympics in Torino Italy, where they finished 9th. Following that she left the team and joined up with Jensen. The new team found success at the 2007 World Women's Curling Championship where they won silver. Denise Dupont returned to the world championships in 2008, where she played third for Angelina Jensen, finishing fifth after losing a tiebreaker to Japan's Moe Meguro.