Mr. Höllermann started his career at the former Hoesch AG in 1990, working at various companies of the thyssenkrupp Group in Germany, Brazil and Mexico in leading positions as plant manager, managing director, CSO, COO and CEO. Since October 2023, he has been appointed as member of the Executive Board and Chief Human Resources Officer of the thyssenkrupp Group’s newly established Decarbon Technologies business segment. From 2020 to 2023 he held the same roles on the Executive Board of the Multi Tracks segment. As of 2016 he was also a member of the Executive Board and Chief Human Resources Officer of thyssenkrupp Industrial Solutions AG, taking over as Chairman of the Executive Board in 2021. In addition, Mr. Höllermann is Chairman of the Supervisory Boards of thyssenkrupp Polysius GmbH and thyssenkrupp Uhde GmbH and a member of the Supervisory Board of thyssenkrupp Automation Engineering GmbH, where he was Chairman until December 2019.

From 2020-2021, he was also member of the supervisory board of thyssenkrupp Federn und Stabilisatoren GmbH. Mr. Höllermann studied mechanical engineering at the Technical University of Dortmund and Industrial Engineering & Management at Dortmund University of Applied Science.