[2] A mother at a young age, Rossi worked for several years as a Bank of Montreal cashier before entering public life.
[5] She resigned from Union Montreal on February 21, 2013, after a corruption scandal implicated some of the party's leading members[6] and joined Équipe Denis Coderre pour Montréal on June 17 of the same year.
When Gilles Deguire resigned as borough mayor amid scandal in January 2016, Rossi was appointed as his interim replacement.
[10] During her tenure as mayor, the city of Montreal introduced a sculpture resembling a ferris wheel as an identifying beacon in one of Montréal-Nord's busiest thoroughfares.
The sculpture prompted some criticism for its $1.1 million cost, although many defended it on the grounds that it added a "rare bit of positive recognition" for the frequently troubled region of the city.