From 2002 to 2004, Boyer served as chief of staff to Mayor of BordeauxAlain Juppé at Bordeaux City Hall.[5] After Juppé lost his office as mayor, he worked for media company Groupe M6 from 2004 until 2006. In 2006, he co-wrote a political novel with Édouard Philippe.
From 2019 until 2022, Boyer was a quaestor of the European Parliament for two and a half years. His role as quaestor made him part of the Parliament's leadership under PresidentDavid Sassoli.[14]
Boyer has been a member of the Committee on Economic and Monetary Affairs (since 2019) and the Subcommittee on Tax Matters (since 2020).[15][16] He also serves on the five-member Advisory Committee on the Conduct of Members, the parliament’s body responsible for assessing alleged breaches of its code of conduct and advising the President of the European Parliament on possible action to be taken,[17]
In addition to his committee assignments, Boyer is part of the MEPs Against Cancer group.[18]
In May 2022, Boyer – together with Stéphane Séjourné for Renaissance and Patrick Mignola for the Democratic Movement (MoDem) – negotiated the agreement leading to the creation of Ensemble, a coalition of the parties forming the presidential majority, including on the financial distribution between them.[19]
In 2019, Boyer had to publicly apologize for using what he called “an ill-chosen word” after saying mayors who refused to fall into line would be considered Emmanuel Macron’s “enemies” at the time of the 2022 presidential election.[21]