The creation of the Chilean Actors and Actresses Union, SIDARTE, took place on September 14, 1967 in the city of Santiago. Although
SIDARTE has a long history at the metropolitan level, it is from 2013, under the presidency of Andrea Gutiérrez (2013-2017), that subsidiaries began to be established at the national level. The Ñuble region, created in 2018, previously belonging to the Biobío region,
joined the national union with the creation of its subsidiary in 2019, in the context of the ENTEPACH XXV Festival (Theater Meeting for
Chillán) . This research seeks to account for the work carried out by SIDARTE in the Ñuble region through a mixed methodology. For this purpose, a survey was applied to the current members to systematize the number of professional or trade actors/skills, such as the areas that they develop the most in the region; and, on the other hand, the presidents who have directed the subsidiary in these 5 years of experience were interviewed. In this way, this study provides evidence about regional theater unionism in 21st century Chile.