From 2002 until 2013, Grübel served on the Committee on Family Affairs, Senior Citizens, Women and Youth. In addition to his work in parliament, he chaired an independent inquiry into allegations of child abuse involving the Roman Catholic Diocese of Rottenburg-Stuttgart from 2011 until 2014.[3][4]
From 2018 to 2021, Grübel was a member of the Committee on Foreign Affairs and the Subcommittee on Civilian Crisis Prevention.[5] In addition to his committee assignments, he has been a member of the German delegation to the Franco-German Parliamentary Assembly from 2019. Since 2021 elections, he has been serving on the Defence Committee.
In September 2023, Grübel announced that he would not stand in the 2025 federal elections but instead resign from active politics by the end of the parliamentary term.[6][7]
Other activities
Center for International Peace Operations (ZIF), Member of the Supervisory Board
Political positions
In June 2017, Grübel voted against Germany's introduction of same-sex marriage.[8]