After graduating from the Saint-Cyr Special Military School in 2005, Laëtitia joined the land forces as an Army officer. She served in external operations in Ivory Coast and in the UNIFIL, in Lebanon. She commanded a company of 200 men within the French-German Brigade, in Müllheim, Germany. She joined the Military Schools of Saumur in 2013, in the direction of studies and foresights, where she worked on the reform of the joint arms doctrine.
Between 2014 and 2017, she was a member of the Council of the Military Land Function and of the Higher Council of the Military Function, working on changing political rights of the members of French armed forces.
Elected Member of Parliament in 2017, she is the first active military personnel in the French National Assembly.
After her election, she was designated Macron’s party Whip for the Foreign Affairs Committee, and judge at the Court of Justice of the Republic. Since October 2019, she is Vice-speaker of the National Assembly, in charge of international activities.
She is particularly active on French-German relations and military issues – as the Rapporteur of the Military programming bill for the Foreign Affairs Committee in March 2018. She also closely follows topics such as tourism, rurality and more generally European issues.