In 2014, Baumann was elected to the Grand Council of Bern for the Green Party,[1] where he was a member of the Justice Commission from 2014 to 2018 and the Building, Energy, Transport and Spatial Planning Commission from 2017.
In 2018, he was re-elected and continued to be a member of the Building, Energy, Transport and Spatial Planning Commission until his resignation from the Grand Council in November 2019.[2] In the national parliamentary elections of 20 October 2019, Baumann was elected to the National Council for the Green Party.[3] He is a member of the Commission for Economic Affairs and Taxation.[4]
Baumann is a member of the board of the Green Party of Seeland and the Small Farmers' Association. He was a member of the board of trustees of the Von Rütte-Gut Foundation in Sutz-Lattrigen and a member of the school board of the Vocational and Further Education Centre (BWZ) in Lyss.[4][5]
In 2021, he was elected president of the Smallholders' Association.[6] Furthermore, he is a member of the patronage committee of Aqua Viva.[7]
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