The Management


Axel Weidner and Dr. Stefan Nehlsen are jointly responsible for the management of Mankenberg GmbH.

With a clear organizational structure and short decision-making processes they provide impetus for Mankenberg’s further development to become a globally leading manufacturer of self-acting control valves.

In doing so, they focus on solid growth through innovative products, digital processes and opening up new markets.



Axel Weidner


was born in Lübeck in 1956. He is the great-grandson of the company founder Gustav Mankenberg and studied mechanical engineering at the Berlin technical university.


Since 1996, as Managing Director, he has been guiding the fortunes of the medium-sized family company, that prides itself on its commitment to staying in its hometown of Lübeck.


He brings his long-time industry experience into the specialized group „Industrial Valves“ of the VDMA (German Machinery and Plant Manufacturers Association) as Chairman of the Board.


Axel Weidner is married and father of two children.



Dr. Stefan Nehlsen


was born in Lübeck in 1963. He studied physics at the Hamburg university, was awarded his doctorate (Dr.-Ing.) at Hamburg-Harburg University of Technology and completed his studies in business administration holding a master degree in econophysics.


After more than two decades of professional and management experience in the machinery and plant engineering sector, he was appointed second Managing Director of Mankenberg GmbH in September 2017.


Dr. Stefan Nehlsen is married and father of two adult sons.



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