Posse began his career at Molinos Río de la Plata, before serving as the CEO of duty-free sales at Aeropuertos Argentina 2000, a subset of Eduardo Eurnekian's Corporación América. Posse also served as head of project management in the "Aconcagua Bioceanic Corridor" between 2009 and 2017, an initiative to link the Atlantic and Pacific oceans through a high-tech railway corridor. During this project, he met Javier Milei.[4]
Political career
Since July 2023, within the framework of the presidential elections, Posse took unpaid leave to dedicate himself fully to the presidential campaign of Javier Milei, candidate of La Libertad Avanza. In the libertarian campaign, Posse was in charge of leading the technical teams of La Libertad Avanza. After Milei's electoral victory, Posse coordinated the transition and was present at the first meeting between president-elect Milei and outgoing president Alberto Fernández at Quinta de Olivos to discuss the transfer of command.[3]