In 1987, she completed her studies in economics with a diploma thesis on economic statistics in South Tyrol,[1] in 1992 successfully completing the law studies offered by the Universities of Innsbruck and Padua with a diploma thesis on the implementation of EC law in Italy.

In the provincial elections in 2003, Unterberger was able to win a seat in the Landtag and thus also in the regional council on the list of the South Tyrolean People's Party.

After Christian Egartner had to resign from the Landtag according to a judgment of the court of cassation, Unterberger moved up for him and was sworn in again as a member of parliament on 21 July 2010.

[4] According to the intended rotation principle at mid-term of the legislative period, she was replaced in this office by Mauro Minniti on 18 May, but remained as vice-president.

[5] Unterberger used her work in the Presidium of the Landtag to implement a new interpretation of the rules of procedure that the opposition parties had unsuccessfully fought against and which will prevent future obstruction.