Joubert began competing on the professional tour in the early 1990s. She reached a best singles ranking of 245 in the world and qualified for two
WTA Tour main draws, at the
Japan Open and
Birmingham Classic in 1994. During her career, she won a total of 18 titles on the
ITF Circuit, three in singles and 15 in doubles. In 2001, she was called up to
South Africa's Fed Cup team for a tie against Slovenia in Spain as a last minute replacement for
Jessica Steck, who was unable to secure a visa. Playing club tennis in the Netherlands at the time, Joubert made the trip to Spain and featured in the doubles rubber, which she and
Kim Grant won against
Maja Matevžič and
Tina Pisnik. ==ITF Circuit finals==