Dagmar Mundani (57) has been appointed Head of the Mergers & Acquisitions (M&A) function at Siemens AG, effective June 1, 2025. She will succeed Karl-Heinz Seibert (65), who is retiring on July 1, 2025.
“With Dagmar Mundani, we’re gaining an experienced and highly qualified expert with excellent leadership qualities for our Mergers & Acquisitions function. She’ll play a decisive role in helping shape our growth and portfolio strategy. M&A is a key component of the investment track of our ONE Tech Company program. Dagmar Mundani will make a major contribution to further strengthening Siemens in high-growth areas and high-growth regions through strategic acquisitions. Her wide-ranging knowledge of our company makes her an ideal choice for this key position. I’m looking forward to working together with her,” said Roland Busch, President and CEO of Siemens AG.
“We’d like to thank Karl-Heinz Seibert for his many years of service and his outstanding commitment to Siemens. Karl-Heinz Seibert has played a major role in shaping Siemens’ M&A activities and has made his department a leading international company-internal corporate M&A unit. He’s also decisively influenced the structure of Siemens’ portfolio. We wish him all the best for the future,” continued Busch.
“I’m looking forward to my new responsibilities and wish to thank the Managing Board of Siemens AG and the Managing Board of Siemens Healthineers AG for the trust they’ve placed in me,” said Dagmar Mundani. “It was a wonderful, exciting and successful time at Siemens Healthineers. I’m very grateful for the privilege of moving from one world-class team to another.”
Dagmar Mundani is currently General Counsel of Siemens Healthineers AG. In this capacity, she is responsible for the company’s Legal, Compliance and Export Control and Customs function, a team with about 500 people from 41 countries. Her most recent successes include legal support for the acquisition of Varian Medical Systems, Inc. by Siemens Healthineers AG in 2021 and for two capital increases totaling €5 billion. Before joining Siemens Healthineers, the trained jurist held various positions at Siemens AG from 1995 to 2017. As Senior Vice President M&A, her last position there, she led numerous multibillion-euro projects, including the spin-off of Osram and the acquisitions of Mentor Graphics, Dresser-Rand and Invensys Rail as well as the sale of Siemens IT Solutions. While at Siemens AG, she also held a variety of positions in the company’s legal department.
Karl-Heinz Seibert began his career at Siemens in 1986 in the company’s Data Systems unit and subsequently held a variety of positions in the Siemens Group. Since 2007, he has decisively shaped Siemens’ M&A activities as Head of the company’s Mergers, Acquisitions & Post Closing Management function. Milestones in his long and successful career include the carve-out and public listings of Siemens Healthineers AG and Siemens Energy AG as well as the successful divestment of the Portfolio Companies, which concluded with the sale of Innomotics, the company’s drives unit. Since 2007, a large number of company acquisitions –including the successful acquisition of Altair Engineering Inc., the most recent highpoint – have been implemented under his leadership.
