I did not want to do this, because it is laborious, but here goes:

He is a PhD Scientist, whose father has extensive experience in Germany's nuclear industry.

No mention of HIS field of expertise, so we should immediately be suspicious.

Oehmen, Josef - Lean Advancement Initiative

The main research interest of Dr. Josef Oehmen is risk management in the value chain, with a special focus on lean product development. Risk management allows companies to design and achieve the optimal risk-return balance in their portfolio of activities, successfully take entrepreneurial risks, increase their performance, and focus their attention on where it is needed most.

...

Josef worked as Assistant to the CTO of SIG Holding AG and in parallel pursued an international MBA at the Collège des Ingénieurs in Paris. He was intensely involved in corporate-wide Technology and Innovation Management and was responsible for technology projects. He studied mechanical engineering at the Technical University of Munich, majoring in Product Development and Production Management. He wrote his diploma thesis at LAI on Risk Management in Product Development. Josef's list of publications can be found here.