A member of the Justicialist Party, she has been serving as Mayor of San Miguel de Tucumán since 2023, the first woman to hold the office.

[1] Rossana was born in San Miguel de Tucumán on 3 April 1966 to businessman Elías Chahla, son of a Syriac Orthodox Syrian immigrant from Homs who was himself married to a Maronite Lebanese woman from Beirut, and Amelia Testa, an Italian from Liguria.

[2] She completed her primary and secondary studies at the Colegio Nuestra Señora del Huerto in her birth city.

[5] She headed the list of candidates for national deputies of the Frente de Todos for Tucumán in the legislative elections of 2021, being seconded by Agustín Fernández.

She has a sister named María Emilia Chahla, with whom she is often mentioned in the press in relation to an ongoing filiation lawsuit initiated in 1999 by Ángel Eduardo Páez, who claims to share her biological father.