Running for team "l'Entente Grand Mulhouse Athle", Brigitte was champion for cadettes in the 400m in 2011 and junior champion of France for the 200 m in 2012 (outdoor and indoor). In 2013, during the European Junior Championships at RietiIt, she took fifth in the 200m and won the silver medal in the 4 × 100m Relay. She became the Under 21 champion of France in the 200m in 2014.