She served as the deputy chairwoman of the SPD parliamentary group under the leadership of chairman Rolf Mützenich from 2019 to 2021.

From 1985 to 1987 she served an apprenticeship as an office assistant at the Duisburger Verkehrsgesellschaft (DVG), where she worked from 1987 to 2001 as a clerk, and later moved to the company's own health insurance.

From 2005 to 2007, she completed further training as a human resources economist (VWA) at the Administrative and Business Academy Essen.

Since 2014, she has been a member of the parliament's Council of Elders, which – among other duties – determines daily legislative agenda items and assigns committee chairpersons based on party representation.

[2] In addition to her committee assignments, Bas is a member of the Parliamentary Friendship Group for Relations with the States of Central America.

Bas is the third female Bundestag president, after Annemarie Renger (SPD) and Rita Süssmuth (CDU).