[1] From 1990 to 1994, she was a municipality director in Tarthun and from 1994 to 2003 head of the joint administrative office Bördeaue.

In the run-off election on 6 May 2007, she lost against the candidate of the SPD, Ulrich Gerstner.

[1] In 2014, she joined the parliament's Council of Elders, which – among other duties – determines daily legislative agenda items and assigning committee chairpersons based on party representation.

[4] Since 2009, Brehmer has been a member of the Federal Council of the CDU Association for Municipal Policies (Kommunalpolitische Vereinigung, KPV),[1] since 2010 also deputy chairman of the CDU Saxony-Anhalt under the leadership of chairman Holger Stahlknecht.

[5] In June 2017, Brehmer voted against Germany's introduction of same-sex marriage.