

Head of department is middle management. Middle management is certainly the most vulnerable position in situations like this.
The top manager got a nice compensation and very high pension (according to German media ~€1.3 million per year), while the owners (Piech/Porsche family) still earn billions every year.
He was designing software for hobbyists and later for the consumer market, he is not Oppenheimer.
I think assuming that militaries would design/use specific software and not use software for hobbyist was a reasonable assumption.