President Javier Milei officially appointed Diego Santilli as the new Jefe de Gabinete of Argentina on Monday [1].
The appointment signals a strategic effort by the Milei administration to strengthen its political profile and ensure the continuity of its reform agenda. By installing a seasoned political figure, the government aims to stabilize its executive leadership after a period of frequent turnover in the role.
Santilli is scheduled to be sworn in during a ceremony at the Casa Rosada in the Salón at 4 p.m. on June 29, 2026 [1], [3]. He replaces Manuel Adorni, whose tenure in the position lasted just under eight months [2].
Santilli becomes the fourth person to serve as Chief of Staff during the Milei era [2]. This appointment represents the third change in the position since the current administration took office [2]. The transition is intended to provide a more expanded power structure to support the president's legislative and administrative goals [4].
"Asumo el desafío más importante de mi vida con el compromiso de seguir trabajando para que este Gobierno siga haciendo historia," Santilli said [5].
In addition to the chief of staff role, Santilli will retain his responsibilities within the interior ministry as part of a broader reorganization of the government's internal structure [6]. The move comes as the administration accelerates changes to relaunch its governance strategy and maintain momentum on economic and social reforms [1].
“"Asumo el desafío más importante de mi vida..."”
The rapid turnover of the Jefe de Gabinete position—with four different individuals in the role—suggests a volatile early period for the Milei administration's executive management. By appointing Santilli, who brings a more established political pedigree, Milei is likely attempting to pivot from a purely technocratic or transitional phase toward a more sustainable political coalition capable of navigating Argentina's complex legislative environment.
