Altman Solon B.V.
METRO AG
Medtronic
Procter & Gamble
SevenVentures GmbH
Thyssenkrupp Management Consulting GmbH
Gartner
Batten & Company
Inverto, A BCG Company
BearingPoint
OSCAR GmbH
Kienbaum Consultants International GmbH
Grant Thornton AG
EY Luxembourg
Rödl & Partner
Implement Consulting Group
Accenture GmbH
Simon Kucher & Partners
Improven B.V.
EY Parthenon
Gupta Strategists B.V.
HÖVELER HOLZMANN CONSULTING GmbH - a valantic company
Accuracy Deutschland
Boer & Croon Management
