References – What others say about our work

Rely on our experience: we have been supporting the supervisory boards of large listed corporations, municipal enterprises, family-owned companies and credit institutions for many years now. Cooperation with our clients is based on trust and discretion. We would be pleased to give you references and name contacts for our projects in a personal conversation.

“Professor Ruhwedel provided professional, goal-oriented and expert support during the review process of the supervisory board and the management.”

Dr. Christian von Villiez, Speaker of the Board, Düsseldorfer Hypothekenbank AG
“The evaluation process and the presentation to the supervisory board were particularly convincing and a real benefit for us.”

Eugen Münch, Company founder and chairman of the supervisory board, Rhön-Klinikum AG
“The Aufsichtsrats-Score provides valuable benchmarks for supervisory boards.”

Prof. Dr. Dieter H. Vogel, Supervisory Board Chairman, Klöckner & Co SE
“An independent review by the Deutsches Institut für Effizienzprüfung reduces the liability risk for supervisory board members.”

Dr. Jürgen Johannes Witte, Partner and expert in corporate, banking and liability law, Hogan Lovells
“Professor Ruhwedel is distinguished by a high level of professionalism, expertise, commitment and integrity.”

Astrid Hamker, lic. oec. HSG, Partner in the Piepenbrock group GmbH & Co. KG and non-executive director
“The diep approach produces meaningful results and at the same time offers real relief for companies carrying out an efficiency review.”

Klaus Thiemann, Industrial Advisor of Private-Equity-Fonds, Supervisory Board and Advisory Board of various companies. Former CEO of Kabel BW, E-Plus and KrupsMoulinex and board member at Arcor
“The methodical, scientifically sound approach of diep creates trust in and acceptance of the evaluation results.”

Prof. Dr. Thorsten Grenz, Chairman of G|PREDICTIVE and Chairman of the Audit Committee of the Drägerwerk AG & Co. KGaA
"Professor Ruhwedel’s presentation convinced both the municipal representatives and the employee representatives on the supervisory board."

Josef Rahmen, former managing director of LVV Leipziger Versorgungs- und Verkehrsgesellschaft mbH