Deutschland > Unternehmen > Karriere bei Audi > Audi Consulting. Management Consulting - Start page. E.ON - Power and Gas - Careers - Students & Graduates - Graduates - Inhouse Consulting. E.ON Inhouse Consulting is the inhouse consultancy of the E.ON Group. Our consulting activities range from developing business strategies to implementing management concepts along the whole value chain. Today, a team of roughly 100 consultants are based in Essen.