Sironi graduated in Industrial Biotechnology at Milano-Bicocca University in 2022. After an internship and a period of pre-doctoral fellowship at IRCCS Ospedale San Raffaele, she moved to the Laboratory of Pharmacology and Brain Pathology in Humanitas Research Hospital.

In November 2022 she started her PhD in Molecular and Experimental Medicine at Humanitas University. At present she is working on the identification of biological markers for prediction of glioblastoma pseudoprogression.