| Nicolás Posse | |
| Office: | Chief of the Cabinet of Ministers |
| President: | Javier Milei |
| Term Start: | 10 December 2023 |
| Predecessor: | Agustín Rossi |
| Successor: | Guillermo Francos |
| Birth Date: | 31 December 1965 |
| Birth Place: | Buenos Aires, Argentina |
| Party: | Independent |
| Otherparty: | La Libertad Avanza |
| Children: | 1 |
| Alma Mater: | ITBA Cambridge University |
| Term End: | 27 May 2024 |
Nicolás José Posse (born 31 December 1965[1]) is an Argentine politician and industrial engineer who served as the country's Chief of the Cabinet of Ministers from December 2023 to May 2024 under president Javier Milei.[2] Before entering politics, Posse served as an executive at Aeropuertos Argentina 2000. Posse served in a major strategic role in Javier Milei's 2023 presidential campaign.[3]
Posse attended the Instituto Tecnológico de Buenos Aires, graduating in 1989, and the University of Cambridge.[4]
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.[5]
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.
On 10 December 2023, he assumed office as Cabinet Chief of the Nation. He resigned on 27 May 2024, being replaced by the former Minister of the Interior, Guillermo Francos.
Posse is married and has one daughter.
Posse is a mountaineer, climbing Aconcagua several times, and has run marathons.