alle Führungskräfte des Hauses mit dem fortgeschrittensten Managementwissen vertraut zu machen, das es zur Zeit gab.
It is the genitiv of "Haus" (meaning "house" or "company").
The german word "Haus" has another meaning that might be of interest for this question:
When talking about aristocrats from certain tribes or clans you say: "Die Kaiser aus dem Hause Habsburg-Lothringen". In English: "The emperors from the house of Habsburg-Lorraine".
Here the word "Haus" or "house" has the meaning of "tribe" or "clan". And I think that the meaning of "company" comes from this.
"Hauses" is somewhat pretentious sounding corporatespeak denoting the company.