She is the president and chairwoman of the Managing Board of the Trumpf GmbH + Co. KG, of which she has been a member since 2003, after having joined the company in 1985 as a public relations and branding specialist.

[1] Leibinger-Kammüller worked in different executive positions for Trumpf, starting in 1984 in the press and public relations department.

Leibinger-Kammüller served as a CDU delegate to the Federal Convention for the purpose of electing the President of Germany in 2009 and 2010.

[27] During the Hannover Messe in April 2016, she was among the 15 German CEOs who were invited to a private dinner with President Barack Obama.

[28] In April 2020, Leibinger-Kammüller was appointed by Minister-President Armin Laschet of North Rhine-Westphalia to a 12-member expert group to advise on economic and social consequences of the COVID-19 pandemic in Germany.