Since the mid-1980s, Beuermann engaged in the peace movement, and in 1999 she actively opposed the war in Kosovo, and through this, joined the Party of Democratic Socialism (PDS). On 12 September 1999, she was elected to the Herne city council, and from 2000 until 2003 was the party's spokeswoman. From 2004 until 2009 she represented Herne in the regional parliament of Arnsberg.