From 2007/08 to 2009/10, as with the French triathletes Laurent Vidal and David Hauss, she took part in an education programme in Paris arranged by the Jean-Luc Lagardère Foundation and the lifelong learning institution, Sciences Po.

In 2011, for the first time, St Louis took part in the French Club Championship Series Lyonnaise des Eaux together with teammates Emmie Charayron and Rebecca Robisch.

From 2009 onwards, she competed in the European U23 Championships (as a Mauritian citizen) and a World Cup, placing 13th in Tarzo Revine and 11th in Huatulco respectively.

In the five years from 2006 to 2011, Fabienne St Louis took part in 28 ITU competitions and achieved 14 top ten positions.

Thanks to a New Flag spot, for which she was the sole contender, St Louis qualified for the London Olympics 2012[2] although she ranked only 80th in the 2012 ITU Point List / Women's Standing as of 27 May 2012.