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Dr. Wilhelm Stein

Stein Engineering & Consulting

Held various executive positions in corporate and startup-companies within the solar industry for over more than 7 years. Before joining the solar industry, he was working in the semiconductor business. Dr. Stein holds a PhD degree from the Max-Planck-Institute in Stuttgart and studied Physics at the University of Heidelberg.

After his PhD thesis, Dr. Stein started his career in the Opto-semiconductor industry at Osram GmbH, where he worked as Process Development Engineer and Project manager in various Development- and production projects with the focus on factory introduction of new high-efficiency technologies (InGaN, InGaAlP). In 2004 he moved into the solar industry to the Swiss High-Tech corporation Oerlikon. Dr. Stein was member of the Senior Management and contributed significantly to the development and market introduction of the Turn-key production lines of the newly founded business unit “Solar”. In 2007 Dr. Stein joined the start-up company Sunfilm AG as Chief Engineer. He was responsible for Build-up, Commissioning and Optimisation of several Thin-Film production lines with ca. 150 MW production capacity. During this period he also collaborated intensively with investors, financial institutes, research labs and customers.

In 2010 Dr. Stein founded Stein Engineering & Consulting with the objective to work independently and entrepreneurial in leading edge technology projects of renowned PV companies. Dr. Stein offers long-term PV-expertise in Equipment, Automation, Process development and Production as well as Research & Development – especially in the field of Thin-film Photovoltaics. Furthermore Dr. Stein advises financial institutes and venture capital investors and works in interims management for industrial customers.


  • Wilfried Rehme
  • Yakov Safir
  • Markus Steinkötter
  • Thomas Schmidt
  • Thomas C. Sauer
  • Dr. Wilhelm Stein