Between 1910 and 1939, 44 women students entered the Ecole Normale Supérieure located rue d'Ulm in Paris, transgressing the fact it was a boys'school. The girls were supposed to study at the girls' Ecole Normale Supérieure de Sèvres. In 1939, as Sèvres was reformed and supposed to offer the same curriculum as Ulm, the administration considered there was no more reasons to allow women to transgress the rule. Through the study of their biographies, we will present their portraits, motivations and the different career profiles they experienced: few dropped out of academic life because of death, illness, persecution during WWII or personal choice. Among those who stayed in the academia, five profiles may be identified: the "stars" who had a brilliant careers in higher education, published a lot, received prizes and recognition, as Jacqueline de Romilly or Marie-Louise Dubreil-Jacotin, the successful academics who made a decent career in higher education and research, the professors who focused on teaching in preparatory classes, the disappointing careers in secondary schools, and the complete outsiders. Beyond personal trajectories, we will try to identify the internal and external factors that influenced their career profile: self motivation, family connections and double careers in the academia, good support from directors and gate-keepers, war, period of time and overall cultural climate, administrative regulations, forced migrations because of double careers, etc. In this paper, we mainly used the sources left by the alumni association, especially testimonies about the first women students in the school and death notices, when they exist. This material provides biographical data, and in addition, information on the way they are perceived by the community, it mixes personal and academic life. The author, the style and the time of the notice, right after the death or a long time after or never, are also interesting indications. We completed this material by additional testimonies and biographical data, plus the book by Jacqueline de Romilly, relating her mother's life (and indirectly hers) and Simone de Beauvoir's autobiographical "La Force de l'Age" to restitute a part of the climate of this period. We also made some comparisons with the careers issues experienced by women trained at the Ecole Normale Supérieure de Sèvres.