Petra Büchel completed her commercial apprenticeship in an industrial company in Switzerland. Parallel to her basic vocational training she completed her vocational baccalaureate. In 2013 she took part in the training course for human resources administrators at the Rorschach-Rheintal training centre. After graduationg, Petra Büchel moved to a trust company in the Rhine Valley. From October 2014 she attended the continuing education course for specialists in finance and accounting with a federal certificate and successfully completed it in spring 2017.
Since November 2018 Petra Büchel has been working as an accounting assistant at BDO (Liechtenstein) AG.