After completing his apprenticeship as a machinist, Klaus Mayer studied industrial engineering at the Munich University of Applied Sciences. He then worked from 1990 to 1992 as a sales engineer at TRUMPF GmbH & Co. KG in Ditzingen. In 1992, he joined his parents’ company in Mergelstetten and assisted the management.

Since 1993, Klaus Mayer has been the main shareholder and managing director of the entire Mayer Group and was responsible for the strategic orientation of the various company divisions. In addition, he was the founding president of the second division soccer club 1. FC Heidenheim 1846 e.V. from 2007 and has been chairman of the supervisory board since 2016. 

In January 2022, Klaus Mayer handed over the operational management of the Mayer Group to Mr. Manuel Linke. Klaus Mayer is now Chairman of the Mayer Supervisory Board.