Krempien joined the Canada women's national wheelchair basketball team in 1992 and remained with the team until 2008. While competing for Canada, Krempien was a consecutive gold medalist at the Wheelchair Basketball World Championship between 1994 and 2006. Apart from the World Championship, Krempien won her first Paralympic gold medal in wheelchair basketball at the 1992 Summer Paralympics with the Canadian team. After additional back to back gold medals from 1996 to 2000, Krempien won a bronze during the 2004 Summer Paralympics. Krempien did not win a medal at her final Paralympics at the 2008 Summer Paralympics. After leaving wheelchair basketball in 2008, Krempien became a nutritional manager at a British Columbia hospital for women and children in the 2010s.