She has worked as a director with the Taller Río Arga schools workshop, a European project for training young people on river and riverbank management, along with various related specialities.

For her supporters, Errazti is a defender of Basque autonomy, which she combines with progressive approach to mainstream issues.

During the legislative session 1995-1999 and again from 1999 till 2003 she headed up the Basque Solidarity Party (Eusko Alkartasuna / EA) group in the Parliament of Navarre.

Following the 2003 provincial elections, despite her name having been at the top of the party list, this position was passed to the present more youthful leadership incumbent in the Navarre assembly, Maiorga Ramírez [es].

[2] After the EA moved closer to the nationalist left, however, and its inclusion in the EH Bildu Basque coalition, she left the EA and became aligned with the Basque Nationalist Party, attending public events in support of the successful 2012 regional presidential candidate, Iñigo Urkullu.