Upon her admission at the
University of Colorado, Van Dusen had been a regular member of the U.S. national wrestling team. In 2002, she moved from California to
Colorado Springs, Colorado to work and train as a resident athlete at the
U.S. Olympic Training Center. She first competed at the U.S. national championships, where she finished between third and fifth place for three consecutive years. At the span of her wrestling career, she had won numerous championship titles, including three at the U.S. world team trials. In addition to her achievements, Van Dusen finished fifth at the 2004 U.S. Olympic trials, which denied her chance to qualify for the
2004 Summer Olympics. She also made her international debut at the
2006 World Wrestling Championships in
Guangzhou, China, where she placed tenth in the women's 55-kg category. Having achieved her best possible finish at the World Championships, Van Dusen qualified for the
2007 Pan American Games in
Rio de Janeiro, Brazil, and competed for the
55-kg category in women's
freestyle wrestling. She won the silver medal in the final match after losing out to Colombia's
Jackeline Rentería, who emerged as one of the top favorites of this event. Van Dusen managed to repeat her silver medal streak at the 2008 Pan American Wrestling Championships in Colorado Springs, when she was defeated by Canada's
Tonya Verbeek in the final match, with a three-set score (1–1, 1–0, 1–1). Van Dusen had never won an international championship title in women's wrestling, until she defeated and upset Japan's
Saori Yoshida at the World Cup in
Taiyuan, China, snapping the opponent's 119-match winning streak. Van Dusen received an elusive qualifying berth at the
2008 Summer Olympics in
Beijing, after competing at the inaugural Olympic qualifying tournament for her respective weight class. ==Olympic games==