Sundstrom represented her nation four times at the World Allround Speed Skating Championships for Women. In 1989 (finishing 22nd overall), in 1991 (finishing 26th overall), in 1993 (finishing 25th overall) and in 1996 (finishing 15th overall). She competed at the 1996 World Single Distance Speed Skating Championships and 1997 World Single Distance Speed Skating Championships in the 1500 metres, finishing 15th in 1996. She also competed at other international competitions, including at ISU Speed Skating World Cups.