MAHLE and Management Board Member Jumana Al-Sibai have mutually agreed to end their cooperation on December 31, 2025.
Al-Sibai has been a Member of the MAHLE Group Management Board since April 2021, most recently responsible for heading the“Thermal and Fluid Systems” business unit, newly formed in the course of a group reorganisation, since the beginning of 2025.
At its scheduled meeting held on December 2, 2025, the MAHLE Supervisory Board appointed Martin Wellhoeffer (47) as her successor. Wellhoeffer has worked for the MAHLE Group in a number of different functions for more than 20 years, most recently as Chief Operating Officer (COO) of the “Thermal and Fluid Systems” business unit. He will take on his new role with effect from January 1, 2026.
On behalf of the MAHLE supervisory bodies, I would like to thank Jumana Al-Sibai for her dedicated work during a challenging phase in the transformation of our company. She has my best wishes for the future, both for her career and for her private life.
Martin Wellhoeffer has comprehensive knowledge of the MAHLE Group, including experience as a Group Management Board Member. In his most recent role as Chief Operating Officer, he has forged ahead in a focused way with the operational excellence of the “Thermal and Fluid Systems” business unit. This is why MAHLE’s supervisory bodies are convinced that he will lead the largest business unit in the group successfully into the future with his expertise – Prof. Dr. Heinz K. Junker, Chairman of the MAHLE Supervisory Board
Martin Wellhoeffer has spent his entire career to date with the MAHLE Group. After completing a degree in automotive engineering, he joined MAHLE as a trainee in the Sales Department in 2004 and then held a number of positions in this area for several years.
In 2015, he became Head of Group Strategy and Sales Planning, before becoming Head of Sales in 2019. In 2023, Wellhoeffer was appointed to the Group Management Board, where he was responsible for the “Mechatronics and Electronics“ business unit. In connection with the downsizing of the Group Management Board at the beginning of 2025, he became COO of the newly formed business unit “Thermal and Fluid Systems”.
Martin Wellhoeffer. Image: MAHLE GmbH
“Following the recent decision, the MAHLE Group Management Board is well-positioned to continue the transformation path the company has embarked on in challenging times,” the Supervisory Board Chairman emphasised. “MAHLE is and remains a strong partner and technology driver for the automotive industry.”
