Born and raised in Charlottetown, Prince Edward Island, Grant started out her sporting career in modern pentathlon at the age of sixteen.

In 1999, Grant received a qualifying berth for the Pan American Games in Winnipeg, Manitoba, where she took home the bronze medal for her national team.

Following her well-accomplished result, she spent five years of training and competition before was able to break through into the international scene in 2002, when she added her first individual bronze medal at the Pan American Championships in Rio de Janeiro, Brazil.

She also graduated from the University of Prince Edward Island with a Bachelor of Science degree in 2002 Grant qualified for the 2004 Summer Olympics in Athens, as one of the first female Canadian modern-pentathletes, and competed in the women's event, where she finished only in twenty-second place.

Following her highest achievements in the international scene, Grant competed at her second Olympics in Beijing in 2008, and finished thirty-first in the women's event.