He has served as a member of the National Assembly for Haut-Rhin's 5th constituency since 2024, having previously held the seat from 2017 to 2022.

[3] In this capacity, he co-authored (with Stéphane Trompille) a parliamentary report on space defence in 2019, calling on the Ministry of the Armies to upgrade its capabilities given the proliferation of competitors and potential enemies.

[4] He was also a member of the French parliamentary friendship groups with Germany, Japan and Romania.

In addition to his committee assignments, Becht was a member of the French delegation to the Parliamentary Assembly of the Council of Europe from 2017 to 2022.

[6] In late 2019, Becht was one of 17 members of the committee who co-signed a letter to Prime Minister Édouard Philippe in which they warned that the 365 million euro ($406 million) sale of aerospace firm Groupe Latécoère to U.S. fund Searchlight Capital raised “questions about the preservation of know-how and France’s defence industry base” and urged government intervention.