She is currently an associate professor at École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland and the head of the SPRING lab (Security and Privacy Engineering Laboratory).

[1][2] Troncoso gained recognition for her leadership of the European team developing the DP-3T protocol that aims at the creation of an application to facilitate the tracing of COVID-19 infected persons without compromising on the privacy of citizens.

[12] Since November 2017 she has been a tenure track assistant professor at the SPRING lab (Security and Privacy Engineering Laboratory)[2] at the School of Computer and Communication Sciences[13] at École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland.

[16][17] In 2020, during the crisis of the Covid-19 pandemic, she leads a team of more than 30 people from eleven European institutions working to develop the DP-3T protocol under the umbrella of the Pan-European Privacy-Preserving Proximity Tracing (PEPP-PT) to create a computer application that tracks contacts and at the same time respects privacy with the aim of letting citizens know if they have been close to someone who days later tests positive for the virus.

[6][19][20][21][22][23][24] As an expert of the topic she also appeared on a number of panels and events such as the IMPACT2020 conference and the International Committee of the Red Cross' release of Data Protection Handbook for Humanitarian Action.