From July 1998 to June 2000, Ms. Gallner was seconded as a research associate to the Federal Labour Court. From May 2001 to the end of July 2002 she attended the Baden-Württemberg Management Acedemy. This was followed by a multi-year assignment to the State Ministry, most recently as Deputy Head of the Human Resources, Justice and Law Department. From July 2005 to May 2007 she was seconded to the Chambers in Mannheim of the Baden-Württemberg State Labour Court.
On May 15th, 2007, Ms. Gallner was appointed as judge at the Federal Labour Court and initially assigned to the Ninth Senate. She then served as Vice Chair of the Seventh and Sixth Senates. Since February 2013, she had been the court’s press spokesperson.
From July 2014 to June 2016, she lead the Baden-Württemberg Ministry of Justice as Ministerial Director. At the end of the legislative period, she returned to the Federal Labour Court and was reassigned to the Sixth Senate.
In October 2017, Ms. Gallner was appointed as presiding judge and assigned to the Tenth Senate.
On January 24th, 2022, Ms. Gallner was appointed as President of the Federal Labour Court.
On January 25th, 2022, Ms. Gallner took over the chair of the First Senate. The First Senate is responsible for legal questions concerning substantive works constitution, staff representation and speaker committee law, freedom of association, tariff ability and tariff responsibility as well as labour dispute law.