The canadian began her career as a referee in 1978, at the age of 14. She worked her way up.and in 1994, became the first female international FIFA referee. Sonia was the first woman to referee a top men's professional game, in El Salvador in 1996. A year later, she became the first female to referee a men's firstdivision game in Brazil.she has refereed at thousands of game at all levels, including over 100 international games, three World Cups, and two Olympic Games.
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