Management and Team

GWZ works together with experienced partners in several industries and countries on a project by project basis. For the current main project, the CyberKnife and oncology center projects, a knowledge base of 150 man-years is working together. They have extensive experience in medical physics, design, installation, commissioning and operating of diagnostics and cancer treatment centers and a proven track-record in education and training of the medical staff.  

Stefan Graber

CEO, business development, finances


Stefan is the founder of GWZ International Investment Management Co., Ltd. and brings into 30 years of experience in international banking, venture capital, private equity, M&A, financing and business development and project management. He has been nine years with Commerzbank and was the co-founder of Venture Select GmbH, a private venture capital company. Investments were made in internet, wireless network, telematics and medical device enterprises in Europe and the U.S. One of the portfolio companies, Accuray Inc. (CyberKnife robotic radiosurgery) has made a successful IPO at NASDAQ and Endoxon, Switzerland (Geo-Intermediate layers) was acquired by Google. Investors in these and other ventures like Blaxxun Interactive (Avatars) were CMGI Ventures, GE Capital, Sevin Rosen, Com Ventures, Nextel Finance and Credit Suisse. 


Transactions in which Stefan was in charge:  

Currently Stefan is concentrating on project development of innovative radiotherapy and diagnostic imaging center networks in Europe, Africa, Middle East and Asia. 

Team Members



Erdembayar Damdinsuren

Trauma surgeon, responsible for Mongolia.


Henri Kamda

Owner A.B.A. Africa Business Association, responsible for  projects in Sub-Sahara Africa and the french speaking Maghreb countries.


Dr. Amal Mukhopadhyay

Owner of ELGA Biotech, Director Institute of Hormone and Fertility Research at the University of Hamburg, visiting Prof. University of Pune, covers the Indian market.


Dr. Anwar Obeidat

Active in the medical equipment sector and in waste management for hospitals projects, covers Jordan and Middle East.


Dr. Lingze Wang

Project development of industry and health tourism projects, responsible for China.