The Executive Board of Salzgitter AG

Gunnar Groebler, born 1972, studied mechanical engineering at RWTH Aachen University. He embarked on his career in 1999 in the Corporate Development department of Berlin-based VEAG Vereinigte Energiewerke AG. Over the years from 2001 to 2002, Groebler was part of the Corporate Development project group for the formation of Vattenfall Europe AG, where he subsequently worked in the Corporate Development department. In 2003 Gunnar Groebler moved to the Group Strategies department of Vattenfall AB in Sweden.

In 2005 he returned to Germany as head of Procurement at Vattenfall Europe AG. Between 2007 and 2011, Groebler was initially responsible for corporate development, later for the Mergers & Acquisitions and finally for Vattenfall Europe AG’s Corporate Development/M&A Department before being appointed head of the Business Unit Hydro Germany. In 2014 he became Chairman of the Management Board of Vattenfall Europe Windkraft GmbH and Head of the Business Unit Renewables Europe / United Kingdom. From 2015 onward, Gunnar Groebler was responsible for the Business Area Wind as member of the Executive Group Management of the Vattenfall Group.

Gunnar Groebler has been a member of Salzgitter AG’S Executive Board since May 2021 and Chairman of the Executive Board since July 2021.

Birgit Dietze, born in 1973, began her professional career with an apprenticeship as an industrial clerk in electrical plant engineering at Elpro AG in Berlin. After working for one year, she studied economics at the Hamburg University of Economics and Politics until 1996, graduating with a diploma. She went on to study law at the Humboldt University in Berlin and passed the second state examination in law in 2008. From 2002 onwards, she worked as a legal advisor at IG Metall. In 2008, Dietze switched to the legal profession and was responsible for collective labour law mandates in a Berlin law firm, often in the context of corporate changes. At the end of 2012, Dietze moved to IG Metall and took over collective bargaining and legal responsibility for Berlin and Brandenburg before moving to the policy department of IG Metall in 2016 and assuming Group responsibility for Volkswagen AG. In this context, she joined the Supervisory Board of VW AG and subsequently took on numerous other supervisory board mandates, including in mechanical engineering and rail vehicle construction. From 2019, she took over as Managing Director of IG Metall Berlin and headed the Berlin, Brandenburg and Saxony district from the end of 2020, before founding her own law firm in Berlin in 2023.

Birgit Dietze has been a member of the Executive Board of Salzgitter AG since September 2024 and has been responsible for Human Resources since January 2025.

Birgit Potrafki, born 1971, studied economics at Leibniz University Hanover. She began her career in 1999 as a trainee at Robert Bosch GmbH. Between 2000 and 2005, she held various positions within the Bosch Group, including heading up the Cost Controlling, Accounting & Finance departments for its international branches in Belgium and China.

In 2006, she took over responsibility for customer and logistics planning at the Group’s Hildesheim plant, before moving to Bosch Rexroth AG where she served as the commercial manager for the Homburg plant until 2012. From 2011 onwards she also held the position – initially as a dual role – of commercial manager for the Mobile Controls and Compact Hydraulics product groups at Bosch Rexroth. In 2013, she moved to the CFO team at Robert Bosch GmbH, where she was responsible for Controlling & Planning and M&A.

From 2016 to 2019, Birgit Potrafki served as Head of the Wiper Systems business unit. While in this role, she was also appointed CFO to the board of the Bosch Electrical Drives division in 2018; and in 2021 she moved to perform the same role on the board of Bosch's new Cross-Domain Computing Solutions division.

Birgit Potrafki has been a member of Salzgitter AG's Executive Board since February 2024 and Chief Financial Officer since April 2024.