She competed for Australia at the 1996 Summer Olympics in Atlanta, where she finished in sixth position, clocking 2:28.34 in the final of the 200-metre breaststroke.

[1] She captained the Australian Swimming Team at the 1998 Commonwealth Games and 1999 Pan Pacific Championships, competing in the 400-metre Individual Medley, 200-metre Butterfly and 800-metre Freestyle events as well as the breaststroke.

Upon retiring from competitive swimming, Neumann was a motivational speaker[2] and worked in public relations and marketing, before becoming a high school teacher.

Neumann's memoir, An Olympic Story, won the 2009 IP Picks Award for Best Creative Non-Fiction and was published the same year.

She has published a number of other short pieces and news articles[3] and is currently working on a series of picture books, a middle-grade fantasy novel, and an historical fiction novel based on the lives of her two grandmothers.