In 2001 Jeon was omitted from the national team roster and did not participated in the 2002 Winter Olympics. In February 2002, however, Jeon gained attention again, winning five gold medals at the national collegiate championships.
Jeon first participated at the Winter Olympics in February 2006. She was expected to compete in the 500 metres as well but competed only in the 3000 metre relay due to injuries, combining with Choi Eun-Kyung, Byun Chun-Sa, Jin Sun-Yu and Kang Yun-Mi. Team Korea eventually won its fourth consecutive Olympic women's 3000 metre relay gold medal.
Jeon was selected as the reserve member of the South Korean national team for the 2010 Winter Olympics, ranked sixth overall in the national Olympic trials. However, she did not get a chance to participate in any event at the Olympics. In February 2011, Jeon won the gold medal in the women's senior 500 metres at the 2011 Korean National Sports Festival by .37 of a second to beat out 2006 Olympic gold medalist Kang Yun-Mi.