Georg Rickhey’s expertise in underground engineering was not limited to the construction of the Führerbunker. During the war, he had also served as a director of the Reich’s Demag motorcar company, where he oversaw the construction of a massive underground facility where tanks had been assembled. And as general manager of the Mittelwerk, he oversaw the construction of the rocket assembly facility near Nordhausen. In his army intelligence dossier, it was noted that Rickhey had overseen the underground construction of more than 1,500,000 square feet of space.
